No. 1
Protection expiredCucurbita maxima Duchesne · Giant pumpkin
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.
Cucurbita maxima Duchesne · Giant pumpkin
Nicotiana tabacum L. · Tobacco
Cucurbita maxima Duchesne · Giant pumpkin
Daucus carota L. · Carrot
Phaseolus vulgaris L. · Common bean
Brassica oleracea L. (White Cabbage Group) · White cabbage
Hordeum vulgare L. · Barley
Solanum lycopersicum L. · Tomato
Daucus carota L. · Carrot
Allium cepa L. var. cepa · Onion
Zea mays L. · Maize
Diospyros kaki L. f. · Persimmon
Zea mays L. · Maize
Raphanus sativus L. · Radish
Daucus carota L. · Carrot
Zea mays L. · Maize
Zea mays L. · Maize
Brassica oleracea L. (White Cabbage Group) · White cabbage
Avena sativa L. · Oat
Pisum sativum L. · Pea
Lactuca sativa L. · Lettuce
Cucumis melo L. · Melon
Cucurbita pepo L. · Field pumpkin
Brassica oleracea L. (Red Cabbage Group) · Red cabbage