Seed certification classes

Classes of seed produced by a grower to ensure the purity of the genetic material. Seed, which undergoes the certification process, is typically inspected during the growing season or at harvest and is tested. Certification classes include: Breeder, Foundation, Registered, Certified, and Common. See also “Breeder seed,” Foundation seed,” “Registered seed,” “Certified seed,” and “common seed.” [Source: USDA National Plant Materials Manual]

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