Washington Revised Code Title 15. Agriculture and Marketing § 15.54.340. Labeling requirements

(1) Any packaged commercial fertilizer distributed in this state that is not a customer-formula fertilizer must have placed on or affixed to the package a label stating in clearly legible and conspicuous form the following information:

(2) Any commercial fertilizer that is distributed in bulk in this state that is not a customer-formula fertilizer must be accompanied by a written or printed statement that includes the information required by subsection (1) of this section and must be supplied to the purchaser at the time of delivery.

(3) Each delivery of a customer-formula fertilizer in this state must be accompanied by either a statement, invoice, a delivery slip, or a label if bagged, containing the following information: The net weight; the brand; the name and amount of each ingredient; the guaranteed analysis which may be stated to the nearest tenth of a percent or to the next lower whole number; the name and address of the registrant or licensee, or manufacturer, or both; and the name and address of the purchaser.

(4) Each delivery of a customer-formula fertilizer must contain the ingredients specified by the purchaser. A record of the invoice or statement of each delivery must be kept by the registrant or licensee for twelve months and must be available to the department upon request.