Seed standards for flax certification.
Standards for each class
Factor | Foundation | Registered | Certified |
Pure seed (min.) | | 98% | 97% |
Inert matter (max.) | | 2% | 3% |
Weed seed (max.)* | | .1% | .2% |
Other crop seed (max.) | | .1% | .2% |
Germination (min.) | | 80% | 80% |
* | Flax must be free of prohibited and objectionable noxious weed seed. |