PDFWAC 16-302-756
Standards for quality orchardgrass seed.
(1) Seed standards for quality orchardgrass seed are as follows:
Minimum % Purity | Minimum % Viability by Germination or TZ Test | Maximum % Other Crop (a) | Maximum % Weed (b) | |
Orchardgrass seed | 90.00 | 85.00 | 0.20 | 0.02 |
Purity component percentages are based on 3 gram sample size. | ||||
(a) | Must be free of ryegrass, timothy, Agrostis sp., Poa sp., brome, reed canarygrass, tall fescue, and meadow foxtail. |
Must be free of the above listed contaminants based upon a 50 gram examination. | |
(b) | Must be free of alfilaria (redstem filaree), Bromus sp., chickweed including all other species in the Caryophyllaceae family, henbit, Poa sp., wild carrot, prohibited noxious weeds listed in WAC 16-301-045, and restricted noxious weeds listed in WAC 16-301-050. |
Must be free of the above listed contaminants based upon a 50 gram examination. |
(2) A quality orchardgrass seed analysis certificate is the basis of determining if a lot meets the quality orchardgrass seed standards. This certificate is issued by the certifying agency and represents a purity test, a 50 gram noxious, all weed, all crop exam, and a viability test.
(3) Seed meeting quality orchardgrass seed standards will be tagged with a "quality orchardgrass seed" tag.
[Statutory Authority: RCW 15.49.005, [15.49].021, [15.49].310, [15.49].370, 15.140.030, and chapter 15.49 RCW. WSR 25-09-035, s 16-302-756, filed 4/9/25, effective 5/10/25. Statutory Authority: RCW 15.49.005, 15.49.310, 15.49.370 (3), (4), and chapter 34.05 RCW. WSR 15-12-109, § 16-302-756, filed 6/3/15, effective 7/4/15.]