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.
Lolium multiflorum Lam. · Italian ryegrass
BARENBRUG HOLLAND
Brassica rapa L. subsp. pekinensis (Lour.) Hanelt · Napa cabbage
Seminis Vegetable Seeds
Dactylis glomerata L. · Cocksfoot
BARENBRUG HOLLAND B.V.
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
GOLDEN WEST SEED RESEARCH Co.
Lactuca sativa L. · Lettuce
Rijk Zwaan Zaadteelt en Zaadhandel BV (NL)
Cucumis sativus L. · Cucumber
HOLLAR SEED CO.
Brassica oleracea L. (White Cabbage Group) · White cabbage
Geoponiko Spiti AEBE
Poa pratensis L. · Kentucky bluegrass
BARENBRUG H.J.M.| H.J.M. Barenbrug
Chrysanthemum L. · Chrysanthemum
Delta-Stek Breeding B.V.
Aster L. · Aster
Bartels, G.B.H.
Aster L. · Aster
Bartels, G.B.H.
Pisum sativum L. · Pea
SLUIS & GROOT BV (NL)
Petroselinum crispum (Mill.) Nyman ex A. W. Hill · Parsley
Petroselinum crispum (Mill.) Nyman ex A. W. Hill · Parsley
Phaseolus vulgaris L. · Common bean
HAO-DEMETER Vine, Fruit Trees and Vegetable Research Institute
Lilium L. · Lily
Vletter & Den Haan Beheer B.V
Brassica napus L. var. napobrassica (L.) Rchb. · Rutabaga
Lilium L. · Lily
FLOOR VLETTER
Citrullus lanatus (Thunb.) Matsum. & Nakai · Watermelon
HOLLAR SEED CO.
Chrysanthemum L. · Chrysanthemum
Pieters Dirk
Gerbera L. · Gerbera
PETRUS JUDOCUS WILHELMUS SCHREURS
Gossypium hirsutum L. · Upland cotton
Phytogen Seed Company LLC
Hordeum vulgare L. · Barley
Adrien Momont et Fils SCA (FR)
Begonia L. · Begonia
MORTEN STEPHENSEN