Development gaps and needs
Science
Version published:
May 30, 2026 - 11:56pm
This section summarizes the science gaps that need to be solved for decarbonization because cultivation is the foundation of every product pathway in this roadmap.
Strain development
There are not enough fast-growing seaweed strains for responsibly scaled cultivation
Commercially cultivated seaweed is dominated by a small number of genera whose production is committed to existing uses and has suffered from climate stress and genetic mis-management (Rimmer et al., 2021). Scaling production for new applications requires diverse strains that are disease-resistant, heat-tolerant and safe for local environments (e.g., University of Connecticut’s National Seaweed Nursery Directory, University of Wisconsin-Milwaukee, Woods Hole Oceanographic Institution; Rahmadi et al., 2025).
Without safeguarding and studying wild seaweed diversity, seaweed cultivation will struggle to expand
Increasing fundamental knowledge about seaweed biology, physiology and reproduction can strengthen efforts to farm at scale and at a profit in tandem with stewarding healthy wild ecosystems (e.g., ADFG, 2020; Kambey et al., 2020).
Cultivation techniques and scale-up
Nutrient and temperature variability constrain yield and quality across cultivation settings
Seaweed growth is primarily determined by nutrient availability, temperature, depth, and turbulence; these factors can impact near- and offshore farms where environmental control is limited, and in nurseries where it directly affects spore/seedling quality and grow-out duration. Tighter environmental controls, siting requirements, and operational practices can help maintain consistent nutrient and temperature parameters (Su et al., 2017; DeAngelo et al., 2023; Duarte et al., 2022).
Environmental impacts
Few environmental impact assessments of seaweed cultivation farms exist, especially at scale
More research is needed to understand how cultivation impacts adjacent and underlying ecosystems. This includes negative (e.g., nutrient competition, adjacent habitat degradation, species invasions, chemical use) and positive (e.g., net climate benefits, marine life interactions) impacts. Developing low-cost methods to track biological and ecological impacts alongside mixed-methods carbon accounting can support responsible scaling practices (Hurd et al., 2022; Fakhraee and Planavsky, 2026; Kelp Forest Foundation, 2025).
Disease is a significant source of production loss across all cultivation settings, but there remains a lack of understanding of how outbreaks develop, spread, and can be reliably prevented.
Better/automated water and seaweed quality monitoring is needed alongside research into pathogen-resistant strain development (Su et al., 2017; e.g., Pacific Northwest National Laboratory, University of New England, University of California, Irvine; University of California, Santa Barbara Kelson Marine).
Ecosystem impact of artificial nutrient enhancement for offshore cultivation needs careful study
Introducing nutrients into oligotrophic systems through upwelling or nutrient fertilization could alter phytoplankton communities and generate cascading ecological impacts that are difficult to predict. Pilot trials that study possible impacts are needed before offshore approaches at scale (reviewed in Hurd et al., 2022).
This section summarizes the science gaps that need to be solved for decarbonization because cultivation is the foundation of every product pathway in this roadmap.
Strain development
There are not enough fast-growing seaweed strains for responsibly scaled cultivation Commercially cultivated seaweed is dominated by a small number of genera whose production is committed to existing uses and has suffered from climate stress and genetic mis-management (Rimmer et al., 2021). Scaling production for new applications requires diverse strains that are disease-resistant, heat-tolerant and safe for local environments (e.g., University of Connecticut’s National Seaweed Nursery Directory, University of Wisconsin-Milwaukee, Woods Hole Oceanographic Institution; Rahmadi et al., 2025). Without safeguarding and studying wild seaweed diversity, seaweed cultivation will struggle to expand Increasing fundamental knowledge about seaweed biology, physiology and reproduction can strengthen efforts to farm at scale and at a profit in tandem with stewarding healthy wild ecosystems (e.g., ADFG, 2020; Kambey et al., 2020).Cultivation techniques and scale-up
Nutrient and temperature variability constrain yield and quality across cultivation settings Seaweed growth is primarily determined by nutrient availability, temperature, depth, and turbulence; these factors can impact near- and offshore farms where environmental control is limited, and in nurseries where it directly affects spore/seedling quality and grow-out duration. Tighter environmental controls, siting requirements, and operational practices can help maintain consistent nutrient and temperature parameters (Su et al., 2017; DeAngelo et al., 2023; Duarte et al., 2022).Environmental impacts
Few environmental impact assessments of seaweed cultivation farms exist, especially at scale More research is needed to understand how cultivation impacts adjacent and underlying ecosystems. This includes negative (e.g., nutrient competition, adjacent habitat degradation, species invasions, chemical use) and positive (e.g., net climate benefits, marine life interactions) impacts. Developing low-cost methods to track biological and ecological impacts alongside mixed-methods carbon accounting can support responsible scaling practices (Hurd et al., 2022; Fakhraee and Planavsky, 2026; Kelp Forest Foundation, 2025). Disease is a significant source of production loss across all cultivation settings, but there remains a lack of understanding of how outbreaks develop, spread, and can be reliably prevented. Better/automated water and seaweed quality monitoring is needed alongside research into pathogen-resistant strain development (Su et al., 2017; e.g., Pacific Northwest National Laboratory, University of New England, University of California, Irvine; University of California, Santa Barbara Kelson Marine). Ecosystem impact of artificial nutrient enhancement for offshore cultivation needs careful study Introducing nutrients into oligotrophic systems through upwelling or nutrient fertilization could alter phytoplankton communities and generate cascading ecological impacts that are difficult to predict. Pilot trials that study possible impacts are needed before offshore approaches at scale (reviewed in Hurd et al., 2022).
This section summarizes gaps that need to be solved for decarbonization because cultivation is the foundation of every product pathway in this roadmap.
Strain development
There are not enough fast-growing seaweed strains for responsibly scaled cultivation Commercially cultivated seaweed is dominated by a small number of genera whose production is committed to existing uses and has suffered from climate stress and genetic mis-management (Rimmer et al., 2021). Scaling production for new applications requires diverse strains that are disease-resistant, heat-tolerant and safe for local environments (e.g., University of Connecticut’s National Seaweed Nursery Directory, University of Wisconsin-Milwaukee, Woods Hole Oceanographic Institution; Rahmadi et al., 2025). Without safeguarding and studying wild seaweed diversity, seaweed cultivation will struggle to expand Increasing fundamental knowledge about seaweed biology, physiology and reproduction can strengthen efforts to farm at scale and at a profit in tandem with stewarding healthy wild ecosystems (e.g., ADFG, 2020; Kambey et al., 2020).Cultivation techniques and scale-up
Nutrient and temperature variability constrain yield and quality across cultivation settings Seaweed growth is primarily determined by nutrient availability, temperature, depth, and turbulence; these factors can impact near- and offshore farms where environmental control is limited, and in nurseries where it directly affects spore/seedling quality and grow-out duration. Tighter environmental controls, siting requirements, and operational practices can help maintain consistent nutrient and temperature parameters (Su et al., 2017; DeAngelo et al., 2023; Duarte et al., 2022).Environmental impacts
Few environmental impact assessments of seaweed cultivation farms exist, especially at scale More research is needed to understand how cultivation impacts adjacent and underlying ecosystems. This includes negative (e.g., nutrient competition, adjacent habitat degradation, species invasions, chemical use) and positive (e.g., net climate benefits, marine life interactions) impacts. Developing low-cost methods to track biological and ecological impacts alongside mixed-methods carbon accounting can support responsible scaling practices (Hurd et al., 2022; Fakhraee and Planavsky, 2026; Kelp Forest Foundation, 2025). Disease is a significant source of production loss across all cultivation settings, but there remains a lack of understanding of how outbreaks develop, spread, and can be reliably prevented. Better/automated water and seaweed quality monitoring is needed alongside research into pathogen-resistant strain development (Su et al., 2017; e.g., Pacific Northwest National Laboratory, University of New England, University of California, Irvine; University of California, Santa Barbara Kelson Marine). Ecosystem impact of artificial nutrient enhancement for offshore cultivation needs careful study Introducing nutrients into oligotrophic systems through upwelling or nutrient fertilization could alter phytoplankton communities and generate cascading ecological impacts that are difficult to predict. Pilot trials that study possible impacts are needed before offshore approaches at scale (reviewed in Hurd et al., 2022).Strain development
There are not enough fast-growing seaweed strains for responsibly scaled cultivation Commercially cultivated seaweed is dominated by a small number of genera whose production is committed to existing uses and has suffered from climate stress and genetic mis-management (Rimmer et al., 2021). Scaling production for new applications requires diverse strains that are disease-resistant, heat-tolerant and safe for local environments (e.g., University of Connecticut’s National Seaweed Nursery Directory, University of Wisconsin-Milwaukee, Woods Hole Oceanographic Institution; Rahmadi et al., 2025). Without safeguarding and studying wild seaweed diversity, seaweed cultivation will struggle to expand Increasing fundamental knowledge about seaweed biology, physiology and reproduction can strengthen efforts to farm at scale and at a profit in tandem with stewarding healthy wild ecosystems (e.g., ADFG, 2020; Kambey et al., 2020).Cultivation techniques and scale-up
Nutrient and temperature variability constrain yield and quality across cultivation settings Seaweed growth is primarily determined by nutrient availability, temperature, depth, and turbulence; these factors can impact near- and offshore farms where environmental control is limited, and in nurseries where it directly affects spore/seedling quality and grow-out duration. Tighter environmental controls, siting requirements, and operational practices can help maintain consistent nutrient and temperature parameters (Su et al., 2017; DeAngelo et al., 2023; Duarte et al., 2022).Environmental impacts
Few environmental impact assessments of seaweed cultivation farms exist, especially at scale More research is needed to understand how cultivation impacts adjacent and underlying ecosystems. This includes negative (e.g., nutrient competition, adjacent habitat degradation, species invasions, chemical use) and positive (e.g., net climate benefits, marine life interactions) impacts. Developing low-cost methods to track biological and ecological impacts alongside mixed-methods carbon accounting can support responsible scaling practices (Hurd et al., 2022; Fakhraee and Planavsky, 2026; Kelp Forest Foundation, 2025). Disease is a significant source of production loss across all cultivation settings, but there remains a lack of understanding of how outbreaks develop, spread, and can be reliably prevented. Better/automated water and seaweed quality monitoring is needed alongside research into pathogen-resistant strain development (Su et al., 2017; e.g., Pacific Northwest National Laboratory, University of New England, University of California, Irvine; University of California, Santa Barbara Kelson Marine). Ecosystem impact of artificial nutrient enhancement for offshore cultivation needs careful study Introducing nutrients into oligotrophic systems through upwelling or nutrient fertilization could alter phytoplankton communities and generate cascading ecological impacts that are difficult to predict. Pilot trials that study possible impacts are needed before offshore approaches at scale (reviewed in Hurd et al., 2022).Strain development
There are not enough fast-growing seaweed strains for responsibly scaled cultivation Commercially cultivated seaweed is dominated by a small number of genera whose production is committed to existing uses and has suffered from climate stress and genetic mis-management (Rimmer et al., 2021). Scaling production for new applications requires diverse strains that are disease-resistant, heat-tolerant and safe for local environments (e.g., University of Connecticut’s National Seaweed Nursery Directory, University of Wisconsin-Milwaukee, Woods Hole Oceanographic Institution; Rahmadi et al., 2025). Without safeguarding and studying wild seaweed diversity, seaweed cultivation will struggle to expand Increasing fundamental knowledge about seaweed biology, physiology and reproduction can strengthen efforts to farm at scale and at a profit in tandem with stewarding healthy wild ecosystems (e.g., ADFG, 2020; Kambey et al., 2020).Cultivation techniques and scale-up
Nutrient and temperature variability constrain yield and quality across cultivation settings Seaweed growth is primarily determined by nutrient availability and temperature; these factors can impact near- and offshore farms where environmental control is limited, and in nurseries where it directly affects spore/seedling quality and grow-out duration. Tighter environmental controls, siting requirements, and operational practices can help maintain consistent nutrient and temperature parameters (Su et al., 2017; DeAngelo et al., 2023; Duarte et al., 2022).Environmental impacts
Few environmental impact assessments of seaweed cultivation farms exist, especially at scale More research is needed to understand how cultivation impacts adjacent and underlying ecosystems. This includes negative (e.g., nutrient competition, adjacent habitat degradation, species invasions, chemical use) and positive (e.g., net climate benefits, marine life interactions) impacts. Developing low-cost methods to track biological and ecological impacts alongside mixed-methods carbon accounting can support responsible scaling practices (Hurd et al., 2022; Fakhraee and Planavsky, 2026; Kelp Forest Foundation, 2025). Disease is a significant source of production loss across all cultivation settings, but there remains a lack of understanding of how outbreaks develop, spread, and can be reliably prevented. Better/automated water and seaweed quality monitoring is needed alongside research into pathogen-resistant strain development (Su et al., 2017; e.g., Pacific Northwest National Laboratory, University of New England, University of California, Irvine; University of California, Santa Barbara Kelson Marine). Ecosystem impact of artificial nutrient enhancement for offshore cultivation needs careful study Introducing nutrients into oligotrophic systems through upwelling or nutrient fertilization could alter phytoplankton communities and generate cascading ecological impacts that are difficult to predict. Pilot trials that study possible impacts are needed before offshore approaches at scale (reviewed in Hurd et al., 2022).Strain development
There are not enough fast-growing seaweed strains for responsibly scaled cultivation Commercially cultivated seaweed is dominated by a small number of genera whose production has suffered from climate stress and genetic mis-management (Rimmer et al., 2021). Scaling requires diverse strains that are disease-resistant, heat-tolerant and safe for local environments (e.g., University of Connecticut’s National Seaweed Nursery Directory, University of Wisconsin-Milwaukee, Woods Hole Oceanographic Institution; Rahmadi et al., 2025). Without safeguarding and studying wild seaweed diversity, seaweed cultivation will struggle to expand Increasing fundamental knowledge about seaweed biology, physiology and reproduction can strengthen efforts to farm at scale and at a profit in tandem with stewarding healthy wild ecosystems (e.g., ADFG, 2020; Kambey et al., 2020).Cultivation techniques and scale-up
Nutrient and temperature variability constrain yield and quality across cultivation settings Seaweed growth is primarily determined by nutrient availability and temperature; these factors can impact near- and offshore farms where environmental control is limited, and in nurseries where it directly affects spore/seedling quality and grow-out duration. Tighter environmental controls, siting requirements, and operational practices can help maintain consistent nutrient and temperature parameters (Su et al., 2017; DeAngelo et al., 2023; Duarte et al., 2022).Environmental impacts
Few environmental impact assessments of seaweed cultivation farms exist, especially at scale More research is needed to understand how cultivation impacts adjacent and underlying ecosystems. This includes negative (e.g., nutrient competition, adjacent habitat degradation, species invasions, chemical use) and positive (e.g., net climate benefits, marine life interactions) impacts. Developing low-cost methods to track biological and ecological impacts alongside mixed-methods carbon accounting can support responsible scaling practices (Hurd et al., 2022; Fakhraee and Planavsky, 2026; Kelp Forest Foundation, 2025). Disease is a significant source of production loss across all cultivation settings, but there remains a lack of understanding of how outbreaks develop, spread, and can be reliably prevented. Better/automated water and seaweed quality monitoring is needed alongside research into pathogen-resistant strain development (Su et al., 2017; e.g., Pacific Northwest National Laboratory, University of New England, University of California, Irvine; University of California, Santa Barbara Kelson Marine). Ecosystem impact of artificial nutrient enhancement for offshore cultivation needs careful study Introducing nutrients into oligotrophic systems through upwelling or nutrient fertilization could alter phytoplankton communities and generate cascading ecological impacts that are difficult to predict. Pilot trials that study possible impacts are needed before offshore approaches at scale (reviewed in Hurd et al., 2022).Strain development
There are not enough fast-growing seaweed strains for responsibly scaled cultivation Commercially cultivated seaweed is dominated by a small number of genera whose production has suffered from climate stress and genetic mis-management (Rimmer et al., 2021). Scaling requires diverse strains that are disease-resistant, heat-tolerant and safe for local environments (e.g., University of Connecticut’s National Seaweed Nursery Directory, University of Wisconsin-Milwaukee, Woods Hole Oceanographic Institution; Rahmadi et al., 2025). Without safeguarding and studying wild seaweed diversity, seaweed cultivation will struggle to expand Increasing fundamental knowledge about seaweed biology, physiology and reproduction can strengthen efforts to farm at scale and at a profit in tandem with stewarding healthy wild ecosystems (e.g., ADFG, 2020; Kambey et al., 2020).Cultivation techniques and scale-up
Nutrient and temperature variability constrain yield and quality across cultivation settings Seaweed growth is primarily determined by nutrient availability and temperature; these factors can impact near- and offshore farms where environmental control is limited, and in nurseries where it directly affects spore/seedling quality and grow-out duration. Tighter environmental controls, siting requirements, and operational practices can help maintain consistent nutrient and temperature parameters (Su et al., 2017; DeAngelo et al., 2023; Duarte et al., 2022).Environmental impacts
Few environmental impact assessments of seaweed cultivation farms exist, especially at scale More research is needed to understand how cultivation impacts adjacent and underlying ecosystems. This includes negative (e.g., nutrient competition, adjacent habitat degradation, species invasions, chemical use) and positive (e.g., net climate benefits, marine life interactions) impacts. Developing low-cost methods to track biological and ecological impacts alongside mixed-methods carbon accounting can support responsible scaling practices (Hurd et al., 2022; Fakhraee and Planavsky, 2026; Kelp Forest Foundation, 2025). Disease is a significant source of production loss across all cultivation settings, but there remains a lack of understanding of how outbreaks develop, spread, and can be reliably prevented. Better/automated water and seaweed quality monitoring is needed alongside research into pathogen-resistant strain development (Su et al., 2017; e.g., Pacific Northwest National Laboratory, University of New England, University of California, Irvine; University of California, Santa Barbara Kelson Marine). Ecosystem impact of artificial nutrient enhancement for offshore cultivation needs careful study Introducing nutrients into oligotrophic systems through upwelling or nutrient fertilization could alter phytoplankton communities and generate cascading ecological impacts that are difficult to predict. Pilot trials that study possible impacts are needed before offshore approaches at scale (reviewed in Hurd et al., 2022).Processing and Engineering
Version published:
May 30, 2026 - 11:58pm
This section summarizes technology gaps that need to be solved to scale cultivation for decarbonization ranging from the development of offshore infrastructure to efficient high-throughput drying technologies.
Processing and conversion technologies
Offshore infrastructure has still not been tested to withstand operational conditions for the duration and the scale needed to realize global GHG mitigation strategies
Offshore seaweed farms require infrastructure development to provide high-yield, low-cost and carbon operations in challenging conditions (Buschmann et al., 2017; Hurd et al., 2014, Masuda et al., 2010; Navarrete et al., 2021) Furthermore, feasibility studies are needed to test offshore farm designs (e.g., University of Southern Mississippi).
Offshore farms face higher load-bearing requirements of cultivated seaweed, requiring new approaches to offset operating costs
The full weight of cultivated seaweed affects farm design, vessel requirements and operational costs. Research is needed to gauge the cost-benefits of approaches to limit weight, integrate different avenues of revenue (e.g., IMTA, waste valorization), or co-locate farms with renewable energy infrastructure (e.g., North Sea Farmers; Tullberg et al., 2022; Stekoll et al., 2025).
Geographic separation of offshore cultivation and processing drives up costs and emissions
The cost and emissions to transport large amounts of wet seaweed to ports can be a nonstarter for new farms, especially those located offshore. R&D is needed to study if/how co-location of seaweed dewatering/drying with cultivation sites lowers the carbon footprint and sells seaweed for a competitive price (Radulovich et al., 2015).
There are fundamental uncertainties in water/seaweed interactions which limit innovation in dewatering/drying technologies
There is a limited scientific understanding of how seaweed retains water and how different water states in seaweed, such as free and bound water, respond to changes in humidity, temperature, and processing conditions, or how much energy is required to remove them efficiently. Targeted research is needed to better characterize water-seaweed interactions and identify the conditions and methods that enable more efficient drying (Díaz-Marín, pers. comm).
The carbon footprint of dewatering/drying needs to be reduced
Post-harvest dewatering/drying is the single largest contributor to most seaweed products’ climate impact (Kim and Paek, 2021; Albright & Fujita, 2023). Current thermal drying is also poorly suited to offshore deployment and dependent on grid electricity. Co-locating renewable energy with seaweed farms and developing onsite low-carbon drying methods capable of 90% moisture reduction are priority engineering targets for lowering products’ energy costs (Santhoshkumar et al., 2023).
This section summarizes technology gaps that need to be solved to scale cultivation for decarbonization ranging from the development of offshore infrastructure to efficient high-throughput drying technologies.
Processing and conversion technologies
Offshore infrastructure has still not been tested to withstand operational conditions for the duration and the scale needed to realize global GHG mitigation strategies Offshore seaweed farms require infrastructure development to provide high-yield, low-cost and carbon operations in challenging conditions (Buschmann et al., 2017; Hurd et al., 2014, Masuda et al., 2010; Navarrete et al., 2021) Furthermore, feasibility studies are needed to test offshore farm designs (e.g., University of Southern Mississippi). Offshore farms face higher load-bearing requirements of cultivated seaweed, requiring new approaches to offset operating costs The full weight of cultivated seaweed affects farm design, vessel requirements and operational costs. Research is needed to gauge the cost-benefits of approaches to limit weight, integrate different avenues of revenue (e.g., IMTA, waste valorization), or co-locate farms with renewable energy infrastructure (e.g., North Sea Farmers; Tullberg et al., 2022; Stekoll et al., 2025). Geographic separation of offshore cultivation and processing drives up costs and emissions The cost and emissions to transport large amounts of wet seaweed to ports can be a nonstarter for new farms, especially those located offshore. R&D is needed to study if/how co-location of seaweed dewatering/drying with cultivation sites lowers the carbon footprint and sells seaweed for a competitive price (Radulovich et al., 2015). There are fundamental uncertainties in water/seaweed interactions which limit innovation in dewatering/drying technologies There is a limited scientific understanding of how seaweed retains water and how different water states in seaweed, such as free and bound water, respond to changes in humidity, temperature, and processing conditions, or how much energy is required to remove them efficiently. Targeted research is needed to better characterize water-seaweed interactions and identify the conditions and methods that enable more efficient drying (Díaz-Marín, pers. comm). The carbon footprint of dewatering/drying needs to be reduced Post-harvest dewatering/drying is the single largest contributor to most seaweed products' climate impact (Kim and Paek, 2021; Albright & Fujita, 2023). Current thermal drying is also poorly suited to offshore deployment and dependent on grid electricity. Co-locating renewable energy with seaweed farms and developing onsite low-carbon drying methods capable of 90% moisture reduction are priority engineering targets for lowering products’ energy costs (Santhoshkumar et al., 2023).
This section summarize technology gaps that need to be solved to scale cultivation for decarbonization ranging from the development of offshore infrastructure to efficient high-throughput drying technologies.
Processing and conversion technologies
Offshore infrastructure has still not been tested to withstand operational conditions for the duration and the scale needed to realize global GHG mitigation strategies Offshore seaweed farms require infrastructure development to provide high-yield, low-cost and carbon operations in challenging conditions (Buschmann et al., 2017; Hurd et al., 2014, Masuda et al., 2010; Navarrete et al., 2021) Furthermore, feasibility studies are needed to test offshore farm designs (e.g., University of Southern Mississippi). Offshore farms face higher load-bearing requirements of cultivated seaweed, requiring new approaches to offset operating costs The full weight of cultivated seaweed affects farm design, vessel requirements and operational costs. Research is needed to gauge the cost-benefits of approaches to limit weight, integrate different avenues of revenue (e.g., IMTA, waste valorization), or co-locate farms with renewable energy infrastructure (e.g., North Sea Farmers; Tullberg et al., 2022; Stekoll et al., 2025). Geographic separation of offshore cultivation and processing drives up costs and emissions The cost and emissions to transport large amounts of wet seaweed to ports can be a nonstarter for new farms, especially those located offshore. R&D is needed to study if/how co-location of seaweed dewatering/drying with cultivation sites lowers the carbon footprint and sells seaweed for a competitive price (Radulovich et al., 2015). There are fundamental uncertainties in water/seaweed interactions which limit innovation in dewatering/drying technologies There is a limited scientific understanding of how seaweed retains water and how different water states in seaweed, such as free and bound water, respond to changes in humidity, temperature, and processing conditions, or how much energy is required to remove them efficiently. Targeted research is needed to better characterize water-seaweed interactions and identify the conditions and methods that enable more efficient drying (Díaz-Marín, pers. comm). The carbon footprint of dewatering/drying needs to be reduced Post-harvest dewatering/drying is the single largest contributor to most seaweed products' climate impact (Kim and Paek, 2021; Albright & Fujita, 2023). Current thermal drying is also poorly suited to offshore deployment and dependent on grid electricity. Co-locating renewable energy with seaweed farms and developing onsite low-carbon drying methods capable of 90% moisture reduction are priority engineering targets for lowering products’ energy costs (Santhoshkumar et al., 2023).Processing and conversion technologies
Offshore infrastructure has still not been tested to withstand operational conditions for the duration and the scale needed to realize global GHG mitigation strategies Offshore seaweed farms require infrastructure development to provide high-yield, low-cost and carbon operations in challenging conditions (Buschmann et al., 2017; Hurd et al., 2014, Masuda et al., 2010; Navarrete et al., 2021) Furthermore, feasibility studies are needed to test offshore farm designs (e.g., University of Southern Mississippi). Offshore farms face higher load-bearing requirements of cultivated seaweed, requiring new approaches to offset operating costs The full weight of cultivated seaweed affects farm design, vessel requirements and operational costs. Research is needed to gauge the cost-benefits of approaches to limit weight, integrate different avenues of revenue (e.g., IMTA, waste valorization), or co-locate farms with renewable energy infrastructure (e.g., North Sea Farmers; Tullberg et al., 2022; Stekoll et al., 2025). Geographic separation of offshore cultivation and processing drives up costs and emissions The cost and emissions to transport large amounts of wet seaweed to ports can be a nonstarter for new farms, especially those located offshore. R&D is needed to study if/how co-location of seaweed dewatering/drying with cultivation sites lowers the carbon footprint and sells seaweed for a competitive price (Radulovich et al., 2015). There are fundamental uncertainties in water/seaweed interactions which limit innovation in dewatering/drying technologies There is a limited scientific understanding of how seaweed retains water and how different water states in seaweed, such as free and bound water, respond to changes in humidity, temperature, and processing conditions, or how much energy is required to remove them efficiently. Targeted research is needed to better characterize water-seaweed interactions and identify the conditions and methods that enable more efficient drying (Díaz-Marín, pers. comm). The carbon footprint of dewatering/drying needs to be reduced Post-harvest dewatering/drying is the single largest contributor to most seaweed products' climate impact (Kim and Paek, 2021; Albright & Fujita, 2023). Current thermal drying is also poorly suited to offshore deployment and dependent on grid electricity. Co-locating renewable energy with seaweed farms and developing onsite low-carbon drying methods capable of 90% moisture reduction are priority engineering targets for lowering products’ energy costs (Santhoshkumar et al., 2023).Processing and conversion technologies
Offshore infrastructure has still not been tested to withstand operational conditions for the duration and the scale needed to realize global GHG mitigation strategies Offshore seaweed farms require infrastructure development to provide high-yield, low-cost and carbon operations in challenging conditions (Buschmann et al., 2017; Hurd et al., 2014, Masuda et al., 2010; Navarrete et al., 2021) Furthermore, feasibility studies are needed to test offshore farm designs (e.g., University of Southern Mississippi). Offshore farms face higher load-bearing requirements of cultivated seaweed, requiring new approaches to offset operating costs The full weight of cultivated seaweed affects farm design, vessel requirements and operational costs. Research is needed to gauge the cost-benefits of approaches to limit weight, integrate different avenues of revenue (e.g., IMTA, waste valorization), or co-locate farms with renewable energy infrastructure (e.g., North Sea Farmers; Tullberg et al., 2022; Stekoll et al., 2025). Geographic separation of offshore cultivation and processing drives up costs and emissions The cost and emissions to transport large amounts of wet seaweed to ports can be a nonstarter for new farms, especially those located offshore. R&D is needed to study if/how co-location of seaweed dewatering/drying with cultivation sites lowers the carbon footprint and sells seaweed for a competitive price (Radulovich et al., 2015). There are fundamental uncertainties in water/seaweed interactions which limit innovation in dewatering/drying technologies There is a limited scientific understanding of how seaweed retains water and how different water states in seaweed, such as free and bound water, respond to changes in humidity, temperature, and processing conditions, or how much energy is required to remove them efficiently. Targeted research is needed to better characterize water-seaweed interactions and identify the conditions and methods that enable more efficient drying (Díaz-Marín, pers. comm). The carbon footprint of dewatering/drying needs to be reduced Post-harvest dewatering/drying is the single largest contributor to most seaweed products' climate impact (Kim and Paek, 2021; Albright & Fujita, 2023). Current thermal drying is also poorly suited to offshore deployment and dependent on grid electricity. Co-locating renewable energy with seaweed farms and developing onsite low-carbon drying methods capable of 90% moisture reduction are priority engineering targets for lowering products’ energy costs (Santhoshkumar et al., 2023).Processing and conversion technologies
Offshore infrastructure has still not been tested to withstand operational conditions for the duration and the scale needed to realize global GHG mitigation strategies Offshore seaweed farms require infrastructure development to provide high-yield, low-cost and carbon operations in challenging conditions (Buschmann et al., 2017; Hurd et al., 2014, Masuda et al., 2010; Navarrete et al., 2021) Furthermore, feasibility studies are needed to test offshore farm designs (e.g., University of Southern Mississippi). Offshore farms face higher load-bearing requirements of cultivated seaweed, requiring new approaches to offset operating costs The full weight of cultivated seaweed affects farm design, vessel requirements and operational costs. Research is needed to gauge the cost-benefits of approaches to limit weight, integrate different avenues of revenue (e.g., IMTA, waste valorization), or co-locate farms with renewable energy infrastructure (e.g., North Sea Farmers; Tullberg et al., 2022; Stekoll et al., 2025). Geographic separation of offshore cultivation and processing drives up costs and emissions The cost and emissions to transport large amounts of wet seaweed to ports can be a nonstarter for new farms, especially those located offshore. R&D is needed to study if/how co-location of seaweed dewatering/drying with cultivation sites lowers the carbon footprint and sells seaweed for a competitive price (Radulovich et al., 2015). The carbon footprint of dewatering/drying needs to be reduced Post-harvest dewatering/drying is the single largest contributor to most seaweed products' climate impact (Kim and Paek, 2021; Albright & Fujita, 2023). Current thermal drying is also poorly suited to offshore deployment and dependent on grid electricity. Co-locating renewable energy with seaweed farms and developing onsite low-carbon drying methods capable of 90% moisture reduction are priority engineering targets for lowering products’ energy costs (Santhoshkumar et al., 2023).Processing and conversion technologies
Offshore infrastructure has still not been tested to withstand operational conditions for the duration and the scale needed to realize global GHG mitigation strategies Offshore seaweed farms require infrastructure development to provide high-yield, low-cost and carbon operations in challenging conditions (Buschmann et al., 2017; Hurd et al., 2014, Masuda et al., 2010; Navarrete et al., 2021) Furthermore, feasibility studies are needed to test offshore farm designs (e.g., University of Southern Mississippi). Offshore farms face higher load-bearing requirements of cultivated seaweed, requiring new approaches to offset operating costs The full weight of cultivated seaweed affects farm design, vessel requirements and operational costs. Research is needed to gauge the cost-benefits of approaches to limit weight, integrate different avenues of revenue (e.g., IMTA, waste valorization), or co-locate farms with renewable energy infrastructure (e.g., North Sea Farmers; Tullberg et al., 2022; Stekoll et al., 2025). Geographic separation of offshore cultivation and processing drives up costs and emissions The cost and emissions to transport large amounts of wet seaweed to ports can be a nonstarter for new farms, especially those located offshore. R&D is needed to study if/how co-location of seaweed dewatering/drying with cultivation sites lowers the carbon footprint and sells seaweed for a competitive price (Radulovich et al., 2015). The carbon footprint of dewatering/drying needs to be reduced Post-harvest dewatering/drying is the single largest contributor to most seaweed products' climate impact (Kim and Paek, 2021; Albright & Fujita, 2023). Current thermal drying is also poorly suited to offshore deployment and dependent on grid electricity. Co-locating renewable energy with seaweed farms and developing onsite low-carbon drying methods capable of 90% moisture reduction are priority engineering targets for lowering products’ energy costs (Santhoshkumar et al., 2023).Markets and Investments
Version published:
May 31, 2026 - 12:00am
This section summarizes gaps that need to be solved to accelerate investment in cultivation for climate impact including the development of measurable low-carbon cultivation practices and incentives to reward these practices.
Enabling equitable market growth
Expanded seaweed cultivation may favor large-scale farming entities with capacity for high-risk investments, pushing out small-scale farmers and destabilizing local/regional livelihoods
Scaling up seaweed cultivation can risk freezing out smallholders, shifting the livelihood aspect from existing seaweed farmers at the expense of local community needs and practices (e.g., ocean-use regulations and fishermen in Maine prefer small-scale seaweed farms as additional, not alternative, revenue; St. Gelais et al., 2022). Diversifying financing portfolios with mechanisms for large (e.g., loan programs, credit unions) and small (e.g., microloans, government assistance programs) farms can expand seaweed cultivation without ostracizing new market entrants (Global Seaweed Coalition, 2025).
Weak demand signals and limited incentives for farmers hamper efforts to increase seaweed production
Concerns about quality consistency and high production costs depress industry appetite to shift to new seaweed-based low-carbon products. Without clear market pull, producers lack the incentive to scale operations. This can be addressed through concerted and sustained investment to scale production, as seen in the Philippine’s introduction of the “cottonii” strain of Kappaphycus alvarezii to catalyze their carrageenan industry (Hafting et al., 2015; Radulovich et al., 2015).
The unstable price of seaweed makes it difficult for farmers, processors and investors to plan for long-term growth and new markets
There is no global standard or organized market for seaweed pricing, resulting in unstable and sometimes volatile price swings, as seen in the 2008 Indonesia price bubble (Aguilar, 2008; Kambey et al., 2020). De-risking tools already established in terrestrial agriculture — crop insurance, blended finance — exist in some high-producing countries and could be complemented by emerging mechanisms such as carbon offset and nutrient credits.
There is no established mechanism to financially reward seaweed farmers for adopting low-carbon practices
Low-carbon decisions — switching to recycled lines, reducing vessel fuel use, adopting low-carbon drying — typically increase costs without generating additional revenue, making them financially disadvantaged relative to conventional approaches. Accountable carbon pricing frameworks linked to farm-level lifecycle accounting could generate direct financial rewards for low-carbon practices through carbon credits, tax incentives, or premium market channels (Spillias et al., 2024; Coast4C GROW program).
Cashflow mismatch between production costs and revenue cycles can depress growth
Seeding, infrastructure, and operating costs fall months before harvest revenues are realized, creating a structural cashflow gap that is particularly acute for smallholders. Brokers or processors that can provide forward purchasing agreements and debt financing mechanisms like revolving loans can provide a safety net for seasonal cultivation cycles and funding delays for capital expenditures (Global Seaweed Coalition, 2025).
Farmers lack access to training and demonstration programs that enable environmentally centered practices
Implementing sustainable practices in seaweed cultivation can increase yield and quality while decreasing the carbon footprint. Demonstration sites and training initiatives for farmers can incentivize more environmentally-friendly practices while maintaining profits, as seen in agriculture (Picazo-Tadeo et al., 2011).
Evidence and evaluation tools for market and investment decisions
Lifecycle analyses (LCAs) of cultivation in the Global South are needed
Many LCA studies on seaweed-based product development are focused on the Global North, at odds with the majority of production occurring in the Global South, and many do not fully account for impacts of seaweed cultivation and processing practices (Mazarrasa et al., 2013). Expanding LCA studies to cover major production regions and employ cultivation-inclusive methodologies are needed.
Carbon cycling on seaweed farms are poorly understood and difficult to monitor
Without reliable methods to track what happens to GHGs absorbed and released during seaweed cultivation farms cannot credibly verify climate benefits or be included in climate finance mechanisms. Developing low-cost measurement and modeling approaches to track these pathways are needed for better understanding needs for unlocking these revenue streams and strengthening the investment case for low-carbon cultivation(Ross et al., 2023; reviewed in Lee et al., 2026).
The economic value of seaweed cultivation’s ecosystem services has not been quantified
Multiple studies have quantified the value of ecosystem services in aquatic ecosystems, lending support to their responsible and sustainable management, but this is absent for seaweed cultivation (Costanza et al., 2014; Berzaghi et al., 2025). Cost-benefit frameworks that account for both the benefits and risks to the environment could help de-risk investment for investors, consumers, and impacted communities.
This section summarizes gaps that need to be solved to accelerate investment in cultivation for climate impact including the development of measurable low-carbon cultivation practices and incentives to reward these practices.
Enabling equitable market growth
Expanded seaweed cultivation may favor large-scale farming entities with capacity for high-risk investments, pushing out small-scale farmers and destabilizing local/regional livelihoods Scaling up seaweed cultivation can risk freezing out smallholders, shifting the livelihood aspect from existing seaweed farmers at the expense of local community needs and practices (e.g., ocean-use regulations and fishermen in Maine prefer small-scale seaweed farms as additional, not alternative, revenue; St. Gelais et al., 2022). Diversifying financing portfolios with mechanisms for large (e.g., loan programs, credit unions) and small (e.g., microloans, government assistance programs) farms can expand seaweed cultivation without ostracizing new market entrants (Global Seaweed Coalition, 2025). Weak demand signals and limited incentives for farmers hamper efforts to increase seaweed production Concerns about quality consistency and high production costs depress industry appetite to shift to new seaweed-based low-carbon products. Without clear market pull, producers lack the incentive to scale operations. This can be addressed through concerted and sustained investment to scale production, as seen in the Philippine’s introduction of the “cottonii” strain of Kappaphycus alvarezii to catalyze their carrageenan industry (Hafting et al., 2015; Radulovich et al., 2015). The unstable price of seaweed makes it difficult for farmers, processors and investors to plan for long-term growth and new markets There is no global standard or organized market for seaweed pricing, resulting in unstable and sometimes volatile price swings, as seen in the 2008 Indonesia price bubble (Aguilar, 2008; Kambey et al., 2020). De-risking tools already established in terrestrial agriculture — crop insurance, blended finance — exist in some high-producing countries and could be complemented by emerging mechanisms such as carbon offset and nutrient credits. There is no established mechanism to financially reward seaweed farmers for adopting low-carbon practices Low-carbon decisions — switching to recycled lines, reducing vessel fuel use, adopting low-carbon drying — typically increase costs without generating additional revenue, making them financially disadvantaged relative to conventional approaches. Accountable carbon pricing frameworks linked to farm-level lifecycle accounting could generate direct financial rewards for low-carbon practices through carbon credits, tax incentives, or premium market channels (Spillias et al., 2024; Coast4C GROW program). Cashflow mismatch between production costs and revenue cycles can depress growth Seeding, infrastructure, and operating costs fall months before harvest revenues are realized, creating a structural cashflow gap that is particularly acute for smallholders. Brokers or processors that can provide forward purchasing agreements and debt financing mechanisms like revolving loans can provide a safety net for seasonal cultivation cycles and funding delays for capital expenditures (Global Seaweed Coalition, 2025). Farmers lack access to training and demonstration programs that enable environmentally centered practices Implementing sustainable practices in seaweed cultivation can increase yield and quality while decreasing the carbon footprint. Demonstration sites and training initiatives for farmers can incentivize more environmentally-friendly practices while maintaining profits, as seen in agriculture (Picazo-Tadeo et al., 2011).Evidence and evaluation tools for market and investment decisions
Lifecycle analyses (LCAs) of cultivation in the Global South are needed Many LCA studies on seaweed-based product development are focused on the Global North, at odds with the majority of production occurring in the Global South, and many do not fully account for impacts of seaweed cultivation and processing practices (Mazarrasa et al., 2013). Expanding LCA studies to cover major production regions and employ cultivation-inclusive methodologies are needed. Carbon cycling on seaweed farms are poorly understood and difficult to monitor Without reliable methods to track what happens to GHGs absorbed and released during seaweed cultivation farms cannot credibly verify climate benefits or be included in climate finance mechanisms. Developing low-cost measurement and modeling approaches to track these pathways are needed for better understanding needs for unlocking these revenue streams and strengthening the investment case for low-carbon cultivation(Ross et al., 2023; reviewed in Lee et al., 2026). The economic value of seaweed cultivation's ecosystem services has not been quantified Multiple studies have quantified the value of ecosystem services in aquatic ecosystems, lending support to their responsible and sustainable management, but this is absent for seaweed cultivation (Costanza et al., 2014; Berzaghi et al., 2025). Cost-benefit frameworks that account for both the benefits and risks to the environment could help de-risk investment for investors, consumers, and impacted communities.Enabling equitable market growth
Expanded seaweed cultivation may favor large-scale farming entities with capacity for high-risk investments, pushing out small-scale farmers and destabilizing local/regional livelihoods Scaling up seaweed cultivation can risk freezing out smallholders, shifting the livelihood aspect from existing seaweed farmers at the expense of local community needs and practices (e.g., ocean-use regulations and fishermen in Maine prefer small-scale seaweed farms as additional, not alternative, revenue; St. Gelais et al., 2022). Diversifying financing portfolios with mechanisms for large (e.g., loan programs, credit unions) and small (e.g., microloans, government assistance programs) farms can expand seaweed cultivation without ostracizing new market entrants (Global Seaweed Coalition, 2025). Weak demand signals and limited incentives for farmers hamper efforts to increase seaweed production Concerns about quality consistency and high production costs depress industry appetite to shift to new seaweed-based low-carbon products. Without clear market pull, producers lack the incentive to scale operations. This can be addressed through concerted and sustained investment to scale production, as seen in the Philippine’s introduction of the “cottonii” strain of Kappaphycus alvarezii to catalyze their carrageenan industry (Hafting et al., 2015; Radulovich et al., 2015). The unstable price of seaweed makes it difficult for farmers, processors and investors to plan for long-term growth and new markets There is no global standard or organized market for seaweed pricing, resulting in unstable and sometimes volatile price swings, as seen in the 2008 Indonesia price bubble (Aguilar, 2008; Kambey et al., 2020). De-risking tools already established in terrestrial agriculture — crop insurance, blended finance — exist in some high-producing countries and could be complemented by emerging mechanisms such as carbon offset and nutrient credits. There is no established mechanism to financially reward seaweed farmers for adopting low-carbon practices Low-carbon decisions — switching to recycled lines, reducing vessel fuel use, adopting low-carbon drying — typically increase costs without generating additional revenue, making them financially disadvantaged relative to conventional approaches. Accountable carbon pricing frameworks linked to farm-level lifecycle accounting could generate direct financial rewards for low-carbon practices through carbon credits, tax incentives, or premium market channels (Spillias et al., 2024; Coast4C GROW program). Cashflow mismatch between production costs and revenue cycles can depress growth Seeding, infrastructure, and operating costs fall months before harvest revenues are realized, creating a structural cashflow gap that is particularly acute for smallholders. Brokers or processors that can provide forward purchasing agreements and debt financing mechanisms like revolving loans can provide a safety net for seasonal cultivation cycles and funding delays for capital expenditures (Global Seaweed Coalition, 2025). Farmers lack access to training and demonstration programs that enable environmentally centered practices Implementing sustainable practices in seaweed cultivation can increase yield and quality while decreasing the carbon footprint. Demonstration sites and training initiatives for farmers can incentivize more environmentally-friendly practices while maintaining profits, as seen in agriculture (Picazo-Tadeo et al., 2011).Evidence and evaluation tools for market and investment decisions
Lifecycle analyses (LCAs) of cultivation in the Global South are needed Many LCA studies on seaweed-based product development are focused on the Global North, at odds with the majority of production occurring in the Global South, and many do not fully account for impacts of seaweed cultivation and processing practices (Mazarrasa et al., 2013). Expanding LCA studies to cover major production regions and employ cultivation-inclusive methodologies are needed. Carbon cycling on seaweed farms are poorly understood and difficult to monitor Without reliable methods to track what happens to GHGs absorbed and released during seaweed cultivation farms cannot credibly verify climate benefits or be included in climate finance mechanisms. Developing low-cost measurement and modeling approaches to track these pathways are needed for better understanding needs for unlocking these revenue streams and strengthening the investment case for low-carbon cultivation(Ross et al., 2023; reviewed in Lee et al., 2026). The economic value of seaweed cultivation's ecosystem services has not been quantified Multiple studies have quantified the value of ecosystem services in aquatic ecosystems, lending support to their responsible and sustainable management, but this is absent for seaweed cultivation (Costanza et al., 2014; Berzaghi et al., 2025). Cost-benefit frameworks that account for both the benefits and risks to the environment could help de-risk investment for investors, consumers, and impacted communities.Enabling equitable market growth
Expanded seaweed cultivation may favor large-scale farming entities with capacity for high-risk investments, pushing out small-scale farmers and destabilizing local/regional livelihoods Scaling up seaweed cultivation can risk freezing out smallholders, shifting the livelihood aspect from existing seaweed farmers at the expense of local community needs and practices (e.g., ocean-use regulations and fishermen in Maine prefer small-scale seaweed farms as additional, not alternative, revenue; St. Gelais et al., 2022). Diversifying financing portfolios with mechanisms for large (e.g., loan programs, credit unions) and small (e.g., microloans, government assistance programs) farms can expand seaweed cultivation without ostracizing new market entrants (Global Seaweed Coalition, 2025). Weak demand signals and limited incentives for farmers hamper efforts to increase seaweed production Concerns about quality consistency and high production costs depress industry appetite to shift to new seaweed-based low-carbon products. Without clear market pull, producers lack the incentive to scale operations. This can be addressed through concerted and sustained investment to scale production, as seen in the Philippine’s introduction of the “cottonii” strain of Kappaphycus alvarezii to catalyze their carrageenan industry (Hafting et al., 2015; Radulovich et al., 2015). The unstable price of seaweed makes it difficult for farmers, processors and investors to plan for long-term growth and new markets There is no global standard or organized market for seaweed pricing, resulting in unstable and sometimes volatile price swings, as seen in the 2008 Indonesia price bubble (Aguilar, 2008; Kambey et al., 2020). De-risking tools already established in terrestrial agriculture — crop insurance, blended finance — exist in some high-producing countries and could be complemented by emerging mechanisms such as carbon offset and nutrient credits. There is no established mechanism to financially reward seaweed farmers for adopting low-carbon practices Low-carbon decisions — switching to recycled lines, reducing vessel fuel use, adopting low-carbon drying — typically increase costs without generating additional revenue, making them financially disadvantaged relative to conventional approaches. Accountable carbon pricing frameworks linked to farm-level lifecycle accounting could generate direct financial rewards for low-carbon practices through carbon credits, tax incentives, or premium market channels (Spillias et al., 2024; Coast4C GROW program). Cashflow mismatch between production costs and revenue cycles can depress growth Seeding, infrastructure, and operating costs fall months before harvest revenues are realized, creating a structural cashflow gap that is particularly acute for smallholders. Brokers or processors that can provide forward purchasing agreements and debt financing mechanisms like revolving loans can provide a safety net for seasonal cultivation cycles and funding delays for capital expenditures (Global Seaweed Coalition, 2025). Farmers lack access to training and demonstration programs that enable environmentally centered practices Implementing sustainable practices in seaweed cultivation can increase yield and quality while decreasing the carbon footprint. Demonstration sites and training initiatives for farmers can incentivize more environmentally-friendly practices while maintaining profits, as seen in agriculture (Picazo-Tadeo et al., 2011).Evidence and evaluation tools for market and investment decisions
Lifecycle analyses (LCAs) of cultivation in the Global South are needed Many LCA studies on seaweed-based product development are focused on the Global North, at odds with the majority of production occurring in the Global South, and many do not fully account for impacts of seaweed cultivation (Mazarrasa et al., 2013). Expanding LCA studies to cover major production regions and employ cultivation-inclusive methodologies are needed. Carbon cycling on seaweed farms are poorly understood and difficult to monitor Without reliable methods to track what happens to GHGs absorbed and released during seaweed cultivation farms cannot credibly verify climate benefits or be included in climate finance mechanisms. Developing low-cost measurement and modeling approaches to track these pathways are needed for better understanding needs for unlocking these revenue streams and strengthening the investment case for low-carbon cultivation(Ross et al., 2023; reviewed in Lee et al., 2026). The economic value of seaweed cultivation's ecosystem services has not been quantified Multiple studies have quantified the value of ecosystem services in aquatic ecosystems, lending support to their responsible and sustainable management, but this is absent for seaweed cultivation (Costanza et al., 2014; Berzaghi et al., 2025). Cost-benefit frameworks that account for both the benefits and risks to the environment could help de-risk investment for investors, consumers, and impacted communities.Policy and Governance
Version published:
May 31, 2026 - 12:03am
This section summarizes gaps that need to be solved to scale cultivation for climate impact, including removing permitting barriers and developing seaweed-specific legislation to incentivize growth.
Regulatory uncertainty and permitting barriers limit the ability for new seaweed farms to develop and existing seaweed farms to scale
Without streamlined, growth-supportive policies, scaling efforts will remain constrained. For example, burdensome and lengthy permitting can create unnecessary farming requirements and discourage investment, particularly in Europe and North America (Camarena Gómez and Lähteenmäki-Uutela, 2024).
Misaligned national and international seaweed governance frameworks can limit responsible and sustainable seaweed production
Seaweed cultivation will struggle to grow sustainably and responsibly if international and national governance is uncoordinated. Aligned frameworks, like conducting marine spatial planning, can ensure responsible site selection and environmental monitoring (Global Seaweed Coalition, 2025; reviewed in Mulyani et al., 2026).
Seaweed-specific legislation is needed to promote market growth
Current regulations used for seaweed were designed for animal aquaculture, making the directives ill-suited and restrictive for industry growth. Seaweed-tailored regulations must also include robust sustainability guidelines and ecosystem service incentives to encourage environment-centered cultivation practices (Camarena Gómez and Lähteenmäki-Uutela, 2024).
This section summarizes gaps that need to be solved to scale cultivation for climate impact, including removing permitting barriers and developing seaweed-specific legislation to incentivize growth.
Regulatory uncertainty and permitting barriers limit the ability for new seaweed farms to develop and existing seaweed farms to scale
This section summarizes gaps that need to be solved to scale cultivation for climate impact, including removing permitting barriers and developing seaweed-specific legislation to incentivize growth.
Regulatory uncertainty and permitting barriers limit the ability for new seaweed farms to develop and existing seaweed farms to scale
Regulatory uncertainty and permitting barriers limit the ability for new seaweed farms to develop and existing seaweed farms to scale
Without streamlined, growth-supportive policies, scaling efforts will remain constrained. For example, burdensome and lengthy permitting can create unnecessary farming requirements and discourage investment, particularly in Europe and North America (Camarena Gómez and Lähteenmäki-Uutela, 2024).
Misaligned national and international seaweed governance frameworks can limit responsible and sustainable seaweed production
Seaweed cultivation will struggle to grow sustainably and responsibly if international and national governance is uncoordinated. Aligned frameworks, like conducting marine spatial planning, can ensure responsible site selection and environmental monitoring (Global Seaweed Coalition, 2025; reviewed in Mulyani et al., 2026).
Seaweed-specific legislation is needed to promote market growth
Current regulations used for seaweed were designed for animal aquaculture, making the directives ill-suited and restrictive for industry growth. Seaweed-tailored regulations must also include robust sustainability guidelines and ecosystem service incentives to encourage environment-centered cultivation practices (Camarena Gómez and Lähteenmäki-Uutela, 2024).
Regulatory uncertainty and permitting barriers limit the ability for new seaweed farms to develop and existing seaweed farms to scale
Without streamlined, growth-supportive policies, scaling efforts will remain constrained. For example, burdensome and lengthy permitting can create unnecessary farming requirements and discourage investment, particularly in Europe and North America (Camarena Gómez and Lähteenmäki-Uutela, 2024).
Misaligned national and international seaweed governance frameworks can limit responsible and sustainable seaweed production
Seaweed cultivation will struggle to grow sustainably and responsibly if international and national governance is uncoordinated. Aligned frameworks, like conducting marine spatial planning, can ensure responsible site selection and environmental monitoring (Global Seaweed Coalition, 2025; reviewed in Mulyani et al., 2026).
Seaweed-specific legislation is needed to promote market growth
Current regulations used for seaweed were designed for animal aquaculture, making the directives ill-suited and restrictive for industry growth. Seaweed-tailored regulations must also include robust sustainability guidelines and ecosystem service incentives to encourage environment-centered cultivation practices (Camarena Gómez and Lähteenmäki-Uutela, 2024).
Regulatory uncertainty and permitting barriers limit the ability for new seaweed farms to develop and existing seaweed farms to scale
Without streamlined, growth-supportive policies, scaling efforts will remain constrained. For example, burdensome and lengthy permitting can create unnecessary farming requirements and discourage investment, particularly in Europe and North America (Camarena Gómez and Lähteenmäki-Uutela, 2024).
Misaligned national and international seaweed governance frameworks can limit responsible and sustainable seaweed production
Seaweed cultivation will struggle to grow sustainably and responsibly if international and national governance is uncoordinated. Aligned frameworks, like conducting marine spatial planning, can ensure responsible site selection and environmental monitoring (Global Seaweed Coalition, 2025; reviewed in Mulyani et al., 2026).
Seaweed-specific legislation is needed to promote market growth
Current regulations used for seaweed were designed for animal aquaculture, making the directives ill-suited and restrictive for industry growth. Seaweed-tailored regulations must also include robust sustainability guidelines and ecosystem service incentives to encourage environment-centered cultivation practices (Camarena Gómez and Lähteenmäki-Uutela, 2024).
Help advance Seaweed road maps. Submit Comments or Content
How to submit comments:
Thanks for helping to advance these roadmaps. Here is how it works!
Or, send general feedback to info@oceanvisions.org
All submitted comments will be reviewed by the Ocean Visions team to ensure that they are true, verifiable, and additive before being added to the road maps. You can increase the likelihood that your comments will be incorporated into the road maps by providing references (where appropriate).