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Oklahoma Department of Agriculture, Food and Forestry
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Consumer Protection Services



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Fertilizer

The Oklahoma Fertilizer Law provides consumer, ground water, and surface water protection. This covers fertilizers used in agriculture production, lawns, and gardens.

Fertilizer is defined as any substance containing one or more recognized plant nutrients which are used for its plant nutrient content and is designed for use or claimed to have value in promoting plant growth.

Each brand and grade of commercial fertilizer must be registered with the Oklahoma Department of Agriculture before being offered for sale, sold, or distributed in this state. Products must have the following information printed either on the bag; on tags affixed to the end of the package; or if in bulk shipments written or printed on the invoice, bill of lading or shipping papers:

  1. The net weight of the contents of the package, lot, or parcel;
  2. Brand name and grade of fertilizer;
  3. The name and address of the registrant or the person guaranteeing the product;
  4. The guaranteed analysis showing the minimum percentage of plant food claimed.

Additional plant food elements may also be included in the guarantee. Any element that is claimed on the bag or accompanying literature must be in the guaranteed analysis.

In addition to product registration any person that is operating a business that is engaged in the distribution, use, or sale of a commercial fertilizer shall obtain a license from the Board for each business location. This does not apply to the ultimate consumer engaged in the physical act of application or to a retail store selling only bagged registered fertilizer.

The Law gives the Department of Agriculture the authority to sample and test fertilizers to determine if it is correctly labeled. It also requires that all firms who are registered to pay a semi-annual inspection fee on all products sold into Oklahoma. Part of this inspection fee goes to a special Soil Fertility Research Account at Oklahoma State University for the sole purpose of conducting soil fertility research involving efficient fertilizer use for agronomic crops and forages and ground water protection from plant food nutrients.

The Law also has preventative measures to protect surface and ground waters from being contaminated with fertilizer. The law states in part: "No person owning or operating a fertilizer storage facility shall discharge or otherwise release or place or cause to be placed any fertilizer material in a location where it is likely to cause contamination of any surface water or ground water of the state."

Consumer Protection Services Field Staff inspects each facility in Oklahoma at least annually. They also do an annual safety inspection of all the anhydrous ammonia tanks within the state.