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. (Cauliflower Group) · Cauliflower
Allium sativum L. · Garlic
Cucumis melo L. · Melon
Capsicum annuum L. · Bell pepper
Brassica oleracea L. (Kohlrabi Group) · Kohlrabi
Festuca pratensis Huds. · Meadow fescue
Solanum lycopersicum L. · Tomato
Daucus carota L. · Carrot
Brassica oleracea L. (Savoy Cabbage Group) · Savoy cabbage
Royal Sluis (NL)
Lolium perenne L. · Perennial ryegrass
Hordeum vulgare L. · Barley
Phaseolus vulgaris L. · Common bean
Brassica napus L. · Rapeseed
Pisum sativum L. · Pea
Solanum melongena L. · Eggplant
Glycine max (L.) Merr. · Soybean
Trifolium alexandrinum L. · Egyptian clover
Solanum melongena L. · Eggplant
Solanum melongena L. · Eggplant
Solanum melongena L. · Eggplant
Hordeum vulgare L. · Barley
Triticum aestivum L. · Bread wheat
Bc Institut d.d. Zagreb (HR)
Helianthus annuus L. · Sunflower
Cichorium endivia L. · Endive