Public domain
Plant breeders' rights are granted for a limited term. Upon expiration, the variety enters the public domain: its seeds can be propagated and sold without the rights holder's license.
Recent years are the most sought-after: the variety is free to use but still in production.
Allium cepa L. var. cepa · Onion
Solanum lycopersicum L. · Tomato
Linum usitatissimum L. · Common flax
Brassica oleracea L. (Broccoli Group) · Broccoli
Medicago sativa L. · Alfalfa
Capsicum annuum L. · Bell pepper
Helianthus annuus L. · Sunflower
Cucumis sativus L. · Cucumber
Brassica oleracea L. (Cauliflower Group) · Cauliflower
Dactylis glomerata L. · Cocksfoot
Brassica oleracea L. (White Cabbage Group) · White cabbage
Allium cepa L. var. cepa · Onion
Medicago sativa L. · Alfalfa
Capsicum annuum L. · Bell pepper
Capsicum annuum L. · Bell pepper
Solanum lycopersicum L. · Tomato
Petroselinum crispum (Mill.) Nyman ex A. W. Hill · Parsley
Spinacia oleracea L. · Spinach
Solanum lycopersicum L. · Tomato
Capsicum annuum L. · Bell pepper
Lactuca sativa L. · Lettuce
Brassica oleracea L. (Kohlrabi Group) · Kohlrabi
Oryza sativa L. · Rice
Cucumis sativus L. · Cucumber