Adds new, specific definitions for plant biostimulants, nutritional chemicals, and vitamin hormone products in the Federal Insecticide, Fungicide, and Rodenticide Act and narrows/updates the definition and exclusions for plant regulators. It also directs the EPA to update implementing regulations within 120 days to reflect the new definitions. Separately, directs the Secretary of Agriculture to carry out a study on plant biostimulants to identify which products and practices best improve soil health, increase organic matter, reduce runoff, and support carbon sequestration, and to report the findings to the House and Senate Agriculture Committees within two years after funds are made available to start the study.

The bill mainly clarifies regulatory coverage for agricultural inputs and commissions a federal study to inform best practices and outcomes for soil and climate goals; it does not itself appropriate funds or change tax law.