Ask whether they've shipped products in your exact category, request guaranteed-analysis data backed by third-party lab assays, confirm they know your state's registration and tonnage rules, and review their stability protocol and batch records. References matter. Chemists on the AJ Cosmo Labs app are pre-screened, and you can message them directly to verify category experience before committing budget.
Read the full guide on how to find a fertilizer formulation chemist →