Wash. Admin. Code § 16-302-705
(1) Land, isolation, and field standards for quinoa seed certification are:
| CLASS | LAND STANDARDS MINIMUM YEARS | ISOLATION STANDARDS MINIMUM FEET/PLANTS PER ACRE | OFF-TYPE MAXIMUM HEAD RATIO (B) | INSEPARABLE OTHER CROP MAXIMUM |
| Foundation | (i) | 100 ft10 plants/acre | 10:10,000 | 10:10,000 |
| Registered | (i) | 100 ft10 plants/acre | 15:10,000 | 15:10,000 |
| Certified | (i) | 100 ft10 plants/acre | 20:10,000 | 20:10,000 |
| (i) | Quinoa shall be grown on land on which the preceding crop was another kind or was planted with Certified seed of the same variety. |
(2) Seed standards for quinoa seed certification are:
| Purity | Foundation | Registered | Certified |
| Pure seed (minimum) | 98.00% | 98.00% | 98.00% |
| Inert matter (maximum) | 2.00% | 2.00% | 2.00% |
| Other crops (maximum) | 0.10% | 0.20% | 0.30% |
| Other varieties (maximum) | 0.05% | 0.05% | 0.10% |
| Weed seeds (maximum) | 0.25% | 0.25% | 0.50% |
| Noxious weed seed | None found | None found | None found |
| Germination (minimum) | 85.00% | 85.00% | 85.00% |
[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 16-302-705, filed 4/9/25, effective 5/10/25.]