PDFWAC 314-55-084
Cannabis plant production.
(1) Only the following specified soil amendments, fertilizers, other crop production aids, and pesticides may be used in the production of cannabis:
(a) Pesticides registered by WSDA under chapter 15.58 RCW as allowed for use in the production, processing, and handling of cannabis. Pesticides must be used consistent with the label requirements.
(b) Commercial fertilizers registered by WSDA under chapter 15.54 RCW.
(c) Potting soil, crop production aids, soil amendments, and other growing media available commercially in the state of Washington may be used in cannabis production. Producers growing outdoors are not required to meet land eligibility requirements outlined in 7 C.F.R. Part 205.202.
(2) Examples of prohibited products:
(a) The use of products containing plant growth regulators not allowed for use on food crops including, but not limited to, any of the following ingredients, is prohibited:
(i) Ancymidol;
(ii) Chlormequat chloride;
(iii) Clofencet;
(iv) Colchicine;
(v) Colloidal silver;
(vi) Daminozide;
(vii) Dikegulac-sodium;
(viii) Flumetralin;
(ix) Flurprimidol; and
(x) Paclobutrazol.
(b) The use of vitamin-hormone products not intended for use on food crops is prohibited.
(c) The use of products containing the insecticide DDVP (Dichlorvos) is prohibited in all areas where cannabis is being grown or processed.
(3) Soil amendments, fertilizers, growing media, other crop production aids, and pesticides that do not conform to subsections (1) and (2) of this section cannot be used, kept, or stored on the licensed premises.
(4) The following cannabis and cannabis products are subject to seizure and destruction:
(a) Cannabis exposed to unauthorized soil amendments or fertilizers; and
(b) Cannabis with levels of unauthorized pesticides or plant growth regulators as provided in WAC 314-55-108.
[Statutory Authority: RCW 69.50.342 and 2022 c 16 § 168. WSR 22-14-111, § 314-55-084, filed 7/6/22, effective 8/6/22. Statutory Authority: RCW 69.50.325, 69.50.342, 69.50.345, and 69.50.369. WSR 18-22-055, § 314-55-084, filed 10/31/18, effective 12/1/18. Statutory Authority: RCW 69.50.342 and 69.50.345. WSR 16-11-110, § 314-55-084, filed 5/18/16, effective 6/18/16; WSR 14-10-044, § 314-55-084, filed 4/30/14, effective 5/31/14. Statutory Authority: RCW 69.50.325, 69.50.331, 69.50.342, 69.50.345. WSR 13-21-104, § 314-55-084, filed 10/21/13, effective 11/21/13.]