Soil and Plant Additives

​​​​Soil and plant additives are substances applied to seed, soil, or plants that claim to improve plant growth, crop yield or quality, or soil properties. To distribute soil and plant additives in Wisconsin, you must:

  • Have an annual soil and plant additive license, valid October 1-September 30.
  • Obtain product permits for each brand name and formulation, valid until you change the label or formulation.
  • Annually report tonnage and pay tonnage fees of $0.45/ton on products distributed in Wisconsin.
  • For products that also make plant nutrient claims, obtain a commercial fertilizer dealer license and if required a fertilizer permit​ for each product.​​

The license is $25/year. Permits are $100/product, a one-time charge.


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