(1) The life of a stand shall be unlimited as long as seventy-five percent of the plants present in the stand are those that were planted originally.
(2) To be eligible for the production of certified class of seed, a field must not have grown or been seeded to the same species during the previous four years for foundation, three years for registered, and two years for certified.
(3) A seed field inspection must be made the year of establishment and at least once each year that seed is to be harvested. This inspection will be made at a time when plant development allows for the detection of factors such as off-type varieties and weed contamination.
(4) Isolation for seed production the minimum distance from a different variety or wild hybridizing populations are as follows:
| Minimum of isolation-feet: |
| Fields of 2 acres or less | Fields of more than 2 acres |
Foundation & registered | 400 | 200 |
Certified | 200 | 100 |
Volunteer plants may be cause for rejection or reclassification of a seed field.
(5) Specific field tolerances:
| Maximum ratio of heads or plants |
Factor | Foundation | Registered | Certified |
Other varieties & off type | 1/1000 | 1/500 | 1/250 |
Other kinds | 1/2000 | 1/1000 | 1/500 |
(Inseparable other species) | | | |
Prohibited noxious weeds | None found | None found | None found |
[Statutory Authority: RCW
15.120.030(3),
15.49.021,
15.49.310, and chapter
34.05 RCW. WSR 17-08-090, § 16-302-465, filed 4/5/17, effective 5/6/17. Statutory Authority: RCW
15.49.005,
15.49.081,
15.49.310,
15.49.370(3), and chapter
34.05 RCW. WSR 14-20-050, § 16-302-465, filed 9/25/14, effective 10/26/14. 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, § 16-302-465, filed 12/4/00, effective 1/4/01.]