Growing media are essential in greenhouse production, but some products now include ingredients or claims that classify them as pesticides. The Minnesota Department of Agriculture (MDA) is reminding producers to understand when a growing media product is considered a pesticide to ensure compliance and protect workers.
A pesticide is defined as any substance or mixture intended to prevent, destroy, repel, or mitigate pests, or for use as a plant regulator, defoliant, or desiccant. Examples include insecticides, herbicides, rodenticides, fungicides, disinfectants, sanitizers, algicides, antimicrobials, and plant regulators.
To determine if a growing media product qualifies as a pesticide, producers should check the product label for an “EPA Reg. No.” If present, the product is federally registered under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA).
Producers are required to follow all label instructions regarding personal protective equipment (PPE), mixing and loading procedures, application methods, storage guidelines, and disposal practices. “Following label instructions is not only essential for safety—it is required by Minnesota law.” Using a pesticide in a manner inconsistent with its labeling violates federal law.
If the pesticide label contains an “Agricultural Use Requirements” box, it falls under the Worker Protection Standard (WPS). When WPS applies at agricultural sites such as greenhouses, employers must provide PPE specified on the label; observe restricted-entry intervals; deliver annual pesticide safety training; notify and post treated areas when required; maintain records of applications and training; provide decontamination supplies like water and soap; and display central posting information where workers can see it.
The MDA enforces these standards through regular inspections of agricultural establishments. Common violations include failure to provide proper PPE, incomplete safety training documentation, lack of notification about treated areas, and improper use of pesticide products.
The MDA oversees regulations for pesticides to protect crops and the environment in Minnesota. The department has around 450 employees and works to enhance quality of life by safeguarding food supplies and supporting the agricultural economy. It builds partnerships with stakeholders to improve services in agriculture across the state. Thom Petersen serves as commissioner of the agency (official website).
For more information about compliance requirements under the Worker Protection Standard (40 CFR part 170), visit the MDA’s WPS webpage. Producers with questions can contact Carlos Sanchez Barahona at (651) 392-5276 or carlos.sanchezbarahona@state.mn.us.
