All states › Washington
What Washington requires before soil amendments, plant amendments, inoculants, biostimulants and similar products are sold there, field by field, with the source for each. Checked on October 4, 2026.
Whether a product is a fertilizer, soil amendment, plant amendment or beneficial substance depends on what its label claims, and each state decides; the same product can fall in different categories in different states. This site lists what each state's law and agency say. It does not say which category any product is in.
Fees, forms and rules change: confirm with the state agency before you register or sell.
| Regulating agency | Washington State Department of Agriculture (WSDA), Fertilizer Program (Registration Services)The words in the source (3)“Fertilizer Product Registration” “Washington State Department of Agriculture Natural Resources Building P.O. Box 42560” “Commercial fertilizer registration—Required for distribution—Application—Fees.” |
|---|---|
| Product categories the state defines | One regulated category: commercial fertilizer, meaning a substance with one or more recognized plant nutrients that is used for its nutrient content or is designated for use or claimed to have value in promoting plant growth; it includes limes, gypsum and manipulated manures. Specialty fertilizer is commercial fertilizer for nonfarm use. Washington has no law or rule that specifically addresses potting soils, horticultural media or soil amendments; WSDA says these may be registered as fertilizers case by case, depending on label claims and guarantees. There is no beneficial substance category.The words in the source (4)“"Commercial fertilizer" means a substance containing one or more recognized plant nutrients and that is used for its plant nutrient content or that is designated for use or claimed to have value in promoting plant growth, and shall include limes, gypsum, and manipulated animal and vegetable manures.” “"Specialty fertilizer" means a commercial fertilizer distributed primarily for nonfarm use” “Washington State does not have laws or rules that specifically address horticultural” “potting soils, or soil amendments. These products may be registered as fertilizers on a case by case basis, depending upon the label claims and guarantees.” |
| Product registration required | Yes, for any product that is a commercial fertilizer: no person may distribute a commercial fertilizer in Washington until the producer, importer or packager registers it. Soil amendments and potting soils are registered as fertilizers case by case, depending on label claims and guarantees.The words in the source (2)“No person may distribute in this state a commercial fertilizer until it has been registered with the department by the producer, importer, or packager of that product.” “These products may be registered as fertilizers on a case by case basis, depending upon the label claims and guarantees.” |
| Registration fee per product | $150 per product for a new registration; $120 per product to renew; $50 per product late fee. WSDA has proposed a 2027 fertilizer registration fee change to the legislature.The words in the source (4)“An application for a new registration must be accompanied by a fee of one hundred fifty dollars for each product.” “must be accompanied by a renewal fee of one hundred twenty dollars for each product” “Application Fee of $150.00 per product.” “learn about WSDA’s 2027 pesticide and fertilizer registration fee change proposal to the legislature” |
| Licence or permit fee | A bulk fertilizer distribution licence is required only to distribute bulk (nonpackaged) fertilizer: $50 a year per location, through the state business licensing system, expiring with the business licence. No licence is required for packaged products alone. Note: That no licence applies to packaged-only sellers is our reading: RCW 15.54.275 is the only licence section we found, and it covers bulk fertilizer. The words in the source (3)“No person may distribute a bulk fertilizer in this state until a license to distribute has been obtained by that person.” “must be accompanied by an annual fee of fifty dollars per location” “"Bulk fertilizer" means commercial fertilizer distributed in a nonpackaged form” |
| Renewal period and date | Registrations run two years, from July 1 to July 1 twenty-four months later; a product added in the last twelve months of the period expires the next July 1. Renewals are due July 1.The words in the source (2)“Registrations are issued by the department for a two-year period beginning on July 1st of a given year and ending twenty-four months later on July 1st” “Application for renewal of registration is due July 1st of each registration period” |
| Tonnage reporting and inspection fee | Inspection fee of 35 cents per ton (20 cents per ton of lime) on commercial fertilizer distributed to nonregistrants or nonlicensees, paid by the last registrant or licensee. Semiannual tonnage reports are due July 31 (January-June) and January 31 (July-December); with permission, under 100 tons per six months can report annually by July 31. Minimum fee $50 a year under 143 tons; a zero report costs $12.50 (semiannual) or $25 (annual); late fee $50.The words in the source (7)“an inspection fee of twenty cents per ton of lime and thirty-five cents per ton of all other commercial fertilizer” “For the period January 1st through June 30th of each year, the report is due on July 31st of that year” “the report is due on January 31st of the following year” “less than one hundred tons for each six-month period” “the registrant or licensee must pay the minimum inspection fee of fifty dollars” “must pay a filing fee of twelve dollars and fifty cents for a semiannual report or twenty-five dollars for an annual report” “the person responsible for filing the report must pay a late fee of fifty dollars” |
| Efficacy or data requirements | WSDA may consider experimental data, manufacturers' evaluations and other authoritative sources to substantiate labeling claims; the data must come from statistically designed trials representative of the soils, crops and climate of the northwestern United States. Every application needs a metals analysis lab report for each product, and waste-derived and micronutrient fertilizers need Department of Ecology approval.The words in the source (4)“the department may consider experimental data, manufacturers' evaluations, data from agricultural experiment stations, product review evaluations, or other authoritative sources to substantiate labeling claims” “The data shall be from statistically designed and analyzed trials representative of the soil, crops, and climatic conditions found in the northwestern area of the United States.” “Metal analysis laboratory report for each product.” “Before registering a waste-derived fertilizer or micronutrient fertilizer, the department shall obtain written approval from the department of ecology” |
| Label requirements (summary) | Packaged commercial fertilizer: net weight; product name, brand and grade (grade not needed if no primary nutrients are claimed); guaranteed analysis; the registrant's or licensee's name and address; a statement referring to WSDA's web address for the product's metals data; and other information required by rule. Bulk deliveries need a written statement with the same information.The words in the source (2)“(a) The net weight; (b) The product name, brand, and grade. The grade is not required if no primary nutrients are claimed; (c) The guaranteed analysis; (d) The name and address of the registrant or licensee.” “A statement, established by rule, referring persons to the department's Uniform Resource Locator (URL) internet address where data regarding the metals content of the product is located” |
| Exemptions relevant to small sellers | Not commercial fertilizer: unmanipulated animal and vegetable manures; organic waste-derived material (vegetative wastes, uncontaminated wood waste, food wastes and materials derived from them through composting, not including biosolids); and biosolids that comply with Ecology's rules and do not use the term "fertilizer" except to disclaim it. Products shipped out of state may be excluded from the inspection fee.The words in the source (4)“It does not include unmanipulated animal and vegetable manures, organic waste-derived material, and other products exempted by the department by rule.” “food wastes, food processing wastes, and materials derived from these wastes through composting” “In addition to unmanipulated animal and vegetable manures and organic waste-derived materials, the following materials are exempt from the definition of commercial fertilizer” “Distribution of commercial fertilizers for shipment to points outside this state may be excluded.” |
| AAPFCO Uniform Beneficial Substances Bill | No beneficial substances law found. The Legislature's list of 2025-26 bills affecting chapter 15.54 RCW shows only HB 2279 (2026), a PFAS evaluation bill that does not add a beneficial substance category. Status: Not adopted The words in the source (2)“<BillId>HB 2279</BillId>” “AN ACT Relating to evaluating the use of PFAS chemicals in agriculture” |
| Online portal or form | WSDA Fertilizer Customer Portal (the Washington Agriculture Licensing, Tonnage, and Registration System, WALTR), reached through a Secure Access Washington (SAW) account; paper Forms 4300A and 4300B.The words in the source (3)“The Fertilizer Customer Portal for electronic submission and payment is now available!” “Washington Agriculture Licensing, Tonnage, and Registration System (WALTR)” “Company Application for Registration of Commercial fertilizer (Form 4300A)” |
Other states: California, Colorado, Florida, Minnesota, Nebraska, New York, Ohio, Oregon. Which states have adopted the AAPFCO beneficial substances bill.