Skip to main content

Fertilizer Definitions

Fertilizer means a substance containing 1 or more recognized plant nutrients, which substance is used for its plant nutrient content and which is designed for use, or claimed to have value, in promoting plant growth. Fertilizer does not include unmanipulated animal and vegetable manures, marl, lime, limestone, wood ashes, and other materials exempted by rules promulgated under this part.


  • Custom mixed fertilizer means a mixed fertilizer formulated according to individual specifications furnished by the consumer before mixing.
  • Fertilizer material means any substance containing any recognized plant nutrient, which is used as a fertilizer or for compounding mixed fertilizers.
  • Mixed fertilizer means a fertilizer containing any combination or mixture of fertilizer materials designed for use or claimed to have value in promoting plant growth, including mixtures of fertilizer and pesticide.
  • Specialty fertilizer means any fertilizer distributed primarily for nonfarm use, such as use in connection with home, gardens, lawns, shrubbery, flowers, golf courses, parks, and cemeteries, and may include fertilizers used for research or experimental purposes. For specialty fertilizers containing a pesticide, the product is required to be registered in accordance with Act 451 of 1994, Part 83, Pesticide Control, in addition to registration as a specialty fertilizer.

Soil conditioner means a substance that is used or intended for use solely for the improvement of the physical nature of soil and for which no claims are made for plant nutrients content. Soil conditioner does not include guaranteed plant nutrients, hormones, bacterial inoculants, and products used in directly influencing or controlling plant growth.


Distribute means to import, consign, sell, barter, offer for sale, solicit orders for sale, or otherwise supply fertilizer for sale or use in this state.


Manufacture means to process, granulate, compound, produce, mix, blend, or alter the composition of fertilizer or fertilizer materials.


Labels - Any written, printed, or graphic matter on or attached to packaged fertilizer or used to identify fertilizer distributed in bulk or held in bulk storage. Labels shall include: brand or product name, grade, guaranteed analysis, net weight, and name of company and address.