Skip to the main content of the page

Fertilizers

​​​​​​​​​​​​​Oregon law

Oregon law defines the following:

  • Agricultural amendment: A mixed or unmixed synthetic chemical substance, a chemically or physically modified natural substance, a naturally occurring substance or a manufacturing by-product, or a combination of those substances or by-products, intended to induce crop yields or plant growth or to produce any physical, microbial, or chemical change in the soil.
  • Agricultural mineral: A mineral substance, mixture of mineral substances or mixture of mineral and organic substances containing less than five percent of total nitrogen (N), available phosphate (P2O5) or soluble potash (K2O), singly, collectively or in combination, designed for use principally as a source of plant food, in inducing increased crop yields or plant growth or producing any physical, microbial, or chemical change in the soil.
  • Fertilizer: Any substance, or any combination or mixture of substances, that is designed for use primarily as a source of plant food, in inducing increased crop yields or plant growth, or producing any physical, microbial or chemical change in the soil, and that contains five percent or more of total nitrogen (N), available phosphate (P2O5) or soluble potash (K2O), singly, collectively, or in combination.
  • Lime: Any substance or mixture of substances having calcium or magnesium compounds capable of neutralizing soil acidity.

See the law (ORS 633.311)​​ for additional details.​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

Product Advisory​

12/10/2020

​​ ​​Fertilizer Program resources

Fertilizer Program Guide

Licensing, registration, and labeling of fertilizing materials. Fertilizer Program Guide

Lime Questions and Answers brochure

Lime information

Selling Garden Products in Oregon: A Quick Guide to Your Responsibilities

Selling garden products quick guide

Selling Garden Products in Oregon: Retail Sale of Feed, Fertilizer or Seed in Bins

Selling garden products in bins information

Laws and rules​

Oregon Fertilizer Laws: ORS 633

Laws governing fertilizer, agricultural amendment and lime products. ORS 633: Grades, Standards and Labels for Feeds, Soil Enhancers and Seeds

Oregon Fertilizer Rules: OAR 603-059

Rules governing fertilizer, agricultural amendments and lime products OAR 603-059: Fertilizers, Agricultural minerals, and limes

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

​​Co​ntact

Main Office
Phone: 503-986-4637
Fax: 503-986-4735
Vacant
Soil Health Specialist
Phone: 503-986-4637
Grant Aman
Fertilizer Specialist
Phone: 503-986-4587
Kevin Coughlin
Fertilizer Enforcement Specialist
Phone: 503-986-4561
Matt Haynes
Fertilizer Specialist
Phone: 503-986-6471
Tess Khofri
Fertilizer Specialist
Phone: 503-986-4648
Tasha Schworak
Fertilizer Registration Assistant
Phone: 503-986-4637
Vacant
Program Manager
Phone: 503-986-4637