Genus
Persicaria
8 US plant patents have been granted in this genus. 7 are already in the public domain — anyone may propagate and sell them. The next of the 1 still protected comes off patent on March 3, 2041.
Still under patent — 1 cultivar
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Flamingo FeathersPP33833Persicaria plant named ‘Flamingo Feathers’UNDER PATENTMarch 3, 2041
Already in the public domain — 7 cultivars
Most recently freed first. Anyone may propagate and sell these plants — though the name it is sold under may still be a live trademark.
- Dragon's EyePP18132Persicaria plant named ‘Dragon's Eye’PUBLIC DOMAINJune 13, 2026
- BlackfieldPP17635Persicaria plant named ‘Blackfield’PUBLIC DOMAINAugust 19, 2025
- Fat DominoPP17467Persicaria plant named ‘Fat Domino’PUBLIC DOMAINJuly 19, 2025
- Chocolate DragonPP17325Persicaria plant named ‘Chocolate Dragon’PUBLIC DOMAINJune 26, 2025
- Silver DragonPP16421PersiCaria plant named ‘Silver Dragon’PUBLIC DOMAINNovember 11, 2024
- Red DragonPP12062Persicaria plant named ‘Red Dragon’PUBLIC DOMAINSeptember 8, 2019
- TaurusPP9682Persicaria plant named TaurusPUBLIC DOMAINJuly 7, 2015
A patent expiring frees the plant, and its cultivar name comes with it — cultivar names cannot be trademarked, so they are always free to use. What it does not free is any brand name the plant is marketed under. Those are trademarks and renew indefinitely.