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.
Brassica oleracea L. convar. botrytis (L.) Alef. var. cymosa Duch. x Brassica oleracea L. var. sabellica L.
Phaseolus vulgaris L. · Common bean
Apium graveolens L. · Celery
Cucumis sativus L. · Cucumber
Cydonia oblonga Mill. · Quince
Vitis L. · Grapevine
Cucurbita pepo L. · Field pumpkin
Hordeum vulgare L. · Barley
Nicotiana tabacum L. · Tobacco
Nicotiana tabacum L. · Tobacco
Nicotiana tabacum L. · Tobacco
Vitis L. · Grapevine
Prunus domestica L. · European plum
Capsicum annuum L. · Bell pepper
Vicia sativa L. · Common vetch
Vicia faba L. · Broad bean
Phacelia tanacetifolia Benth. · Lacy phacelia
Petroselinum crispum (Mill.) Nyman ex A. W. Hill · Parsley
Capsicum annuum L. · Bell pepper
Nicotiana tabacum L. · Tobacco
Avena sativa L. · Oat
Gossypium L. · Cotton
Cucurbita maxima Duchesne · Giant pumpkin
Lactuca sativa L. · Lettuce