1. (1) The label shall list when any reference is made on the label, labeling, or graphic material of a plant food to "trace elements," "minor elements," "secondary elements," "plant foods," or similar generalized terms, each individual plant food to which the term refers.

2. (2) Other plant nutrients, when mentioned in any form or manner, shall be registered and shall be guaranteed.

   1. (a) Each guarantee shall be made on the elemental basis.
   2. (b) Sources of the elements guaranteed, and proof of availability shall be provided to the department upon request.
   3. (c) Except for water soluble nutrients labeled for ready to use foliar fertilizers, ready to use specialty liquid fertilizers, hydroponic or continuous liquid feed programs and guarantees for potting, garden and lawn soils, the minimum percentages which will be accepted for registration are in the AAPFCO Minimum Concentration Table, Official Publication No. 78.
3. (3) A fertilizer label may not bear a statement that implies that certain plant nutrients contained in a fertilizer are released slowly over a period, unless each slow release component is identified and guaranteed at a level of at least 15% of the total guarantee for that nutrient.
4. (4) The department may require evidence and an acceptable testing procedure to substantiate each claim.

5. (5) Pesticide may be added to registered plant food, if:

   1. (a) the pesticide is registered; and
   2. (b) each plant food and pesticide mixture has a label showing the information required in Sections 4-13-104, and 4-14-104.

KEY: plant food, product registration, labeling, unlawful acts

Date of Last Change: December 22, 2025

Notice of Continuation: August 21, 2024

Authorizing, and Implemented or Interpreted Law: 4-2-103(1)(i); 4-13-110