Plant Biostimulant Act of 2025

HR 3783, the Plant Biostimulant Act of 2025, defines "plant biostimulant" as substances or microorganisms that improve plant growth, nutrient use, and stress tolerance without relying on nutrient content. It amends the Federal Insecticide, Fungicide, and Rodenticide Act to create this new category, excluding products primarily intended as nutrients or plant regulators. The bill requires the EPA to update regulations within 120 days and directs the Secretary of Agriculture to conduct a two-year study on how biostimulants improve soil health, reduce runoff, and support climate benefits like carbon sequestration. This directly affects farmers using biostimulants, manufacturers of these products, and federal agencies regulating agricultural inputs.