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.
Glandularia x hybrida (hort. ex Groenl. & Rümpler) G. L. Nesom & Pruski · Common Garden Verbena
Dianthus barbatus L. · Sweet William
Cyclamen persicum Mill. · Persian cyclamen
Begonia x tuberhybrida Voss · Tuberous begonia
Arctotis fastuosa Jacq. · African daisy
Alcea rosea L. · Hollyhock
Brassica oleracea L. (White Cabbage Group) · White cabbage
Lilium L. · Lily
Triticum aestivum L. · Bread wheat
Cicer arietinum L. · Chickpea
Schefflera J. R. Forst. & G. Forst. · Umbrella tree
Tulipa L. · Tulip
Chrysanthemum L. · Chrysanthemum
Prunus armeniaca L. · Apricot
Schefflera arboricola (Hayata) Hayata ex Merr. · Dwarf umbrella tree
Kalanchoe Adans. · Kalanchoe
Chrysanthemum L. · Chrysanthemum
Lactuca sativa L. · Lettuce
Phaseolus vulgaris L. · Common bean
Chrysanthemum L. · Chrysanthemum
Saintpaulia ionantha H. Wendl. · African violet
Gladiolus L. · Gladiolus
Lilium L. · Lily
Lolium perenne L. · Perennial ryegrass