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.
Triticum aestivum L. · Bread wheat
Lactuca sativa L. · Lettuce
Triticum aestivum L. · Bread wheat
Zea mays L. subsp. mays (Sweet Corn Group) · Sweet corn
Capsicum annuum L. · Bell pepper
Zea mays L. · Maize
Cucumis sativus L. · Cucumber
Allium sativum L. · Garlic
Helianthus annuus L. · Sunflower
Allium cepa L. var. cepa · Onion
Pisum sativum L. · Pea
Capsicum annuum L. · Bell pepper
Cucumis sativus L. · Cucumber
Capsicum annuum L. · Bell pepper
Brassica rapa L. subsp. pekinensis (Lour.) Hanelt · Napa cabbage
Brassica oleracea L. (Red Cabbage Group) · Red cabbage
Helianthus annuus L. · Sunflower
Allium cepa L. var. cepa · Onion
Zea mays L. subsp. mays (Maize Group) · Maize
Beta vulgaris Sugar Beet Group · Sugar beet
Allium cepa L. var. cepa · Onion
Brassica oleracea L. (White Cabbage Group) · White cabbage
Zea mays L. subsp. mays (Maize Group) · Maize
Brassica juncea (L.) Czern. · Brown mustard