class | land minimum years | isolation minimum feet | field off-type maximum | other crop maximum |
Foundation | 2* | 2,640 | 1:10,000 | None found |
Registered | 1* | 1,320 | 1:5,000 | 1:30,000 |
Certified | 1* | 660 | 1:2,000 | 1:10,000 |
* Waived if previous crop was the same variety and equal or higher class of certified seed. |
class | off-type maximum seeds/lb | pure seed minimum % | inert maximum % | other crop maximum seeds/lb | weed maximum % | germination minimum % |
foundation | 0.5 | 99.0 | 1.0 | 0.5 | 0.05 | 85 |
registered | 1 | 99.0 | 1.0 | 1 | 0.05 | 85 |
certified | 3 | 99.0 | 1.0 | 3 | 0.10 | 85 |