No superphosphate containing less than eighteen percent of available phosphoric acid may be sold or offered for sale in this state. Specialty fertilizers, except manipulated animal and vegetable manures, guaranteeing less than five percent total plant food shall contain on the label specific directions for use, and prior to registration, the department may require proof of the efficacy of the product when used as directed.
RCW 15.54.400
Restrictions on sale—Minimum percentages.
Known as the Washington Commercial Fertilizer Act
The act spans §§ 15.54.265 to 15.54.950 (31 sections).
Applied in 1 court decision — leading case Manufactured Housing Communities v. State (2000)
Most recently applied in Manufactured Housing Communities v. State (November 2000)
1987 c 45 s 19; 1967 ex.s. c 22 s 28.
Official source: Washington State Legislature. Reproduced from public-domain Washington statutes; confirm against the official source for the current text. Not legal advice.