Wash. Admin. Code § 16-302-455
Standards for each class:
NS = No Standard
| Purity | Foundation | Registered | Certified |
| Pure seed (min.) | NS | 98.00% | 97.00% |
| Inert matter (max.) | NS | 2.00% | 3.00% |
| Weed seed (max.)* | NS | 0.10% | 0.20% |
| Other crop seed (max.) | NS | 0.10% | 0.20% |
| Germination (min.) | NS | 80.00% | 80.00% |
| * | Flax must be free of prohibited and objectionable noxious weed seed. |
[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 16-302-455, filed 4/9/25, effective 5/10/25. Statutory Authority: RCW 15.49.005, 15.49.081, 15.49.310, 15.49.370(3) and chapter 17.24 RCW. WSR 00-24-077, § 16-302-455, filed 12/4/00, effective 1/4/01.]