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.
Sinningia speciosa (G. Lodd.) Hiern · Gloxinia
Tropaeolum majus L. · Garden nasturtium
Begonia x tuberhybrida Voss · Tuberous begonia
Brassica oleracea L. (Savoy Cabbage Group) · Savoy cabbage
Solanum lycopersicum L. · Tomato
Zea mays L. · Maize
Veronica L. · Speedwell
Rheum rhabarbarum L. · Rhubarb
Lilium L. · Lily
Freesia Eckl. ex Klatt · Freesia
Lilium L. · Lily
Cichorium intybus L. · Chicory
C. E. Zimmermann (US)
Lilium L. · Lily
Lilium L. · Lily
Iris L. · Iris
Gladiolus L. · Gladiolus
Schefflera arboricola (Hayata) Hayata ex Merr. · Dwarf umbrella tree
Tulipa L. · Tulip
Iris L. · Iris
Poa pratensis L. · Kentucky bluegrass
Tulipa L. · Tulip
Centaurea montana L.
Tulipa L. · Tulip
Anthurium Schott · Anthurium