This guide explores the growing potential of seaweed biostimulants as a promising market opportunity for seaweed farmers and aquaculture enterprises. It highlights the role of seaweed cultivation in supporting sustainable food production, climate change mitigation, environmental restoration, and rural livelihoods. Seaweed-derived biostimulants have demonstrated benefits including enhanced plant growth, improved crop resilience to environmental stress, and better soil health, helping address challenges such as food insecurity, freshwater scarcity, and land degradation. The report notes that biostimulants represent one of the most viable near-term markets for the expanding seaweed industry, with strong growth projections and increasing demand worldwide. However, successful participation in this market requires a clear understanding of value chains, processing requirements, product development, and buyer expectations. The guide emphasizes the importance of partnerships among seaweed farmers, biostimulant manufacturers, and agricultural producers to develop scalable, sustainable markets and maximize the economic and environmental benefits of seaweed-based agricultural solutions.