Biostimulant Market Outlook | Size, Share & Growth Forecast The global biostimulant market is projected to grow from an estimated $2.7 billion in 2023 to around $5.6 billion by 2033. That’s a solid compound annual growth rate of 7.5% over the forecast period Biostimulants made from humic/fulvic acids, seaweed extracts, amino acids, and beneficial microbes aren’t fertilizers per se. Instead, they boost plant nutrient uptake, stress resilience, and yield quality, complementing rather than replacing conventional inputs