Plant
Persicaria
7 US plant patents name this plant. 6 have expired, so those cultivars are free to propagate and sell. 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 — 6 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
- Red DragonPP12062Persicaria plant named ‘Red Dragon’PUBLIC DOMAINSeptember 8, 2019
- TaurusPP9682Persicaria plant named TaurusPUBLIC DOMAINJuly 7, 2015
Botanically this is Persicaria. A patent expiring frees the plant, and its cultivar name with it — cultivar names cannot be trademarked. Any brand name it is sold under is a separate thing and may still be owned.