Plant
Vernonia
4 US plant patents name this plant. 0 have expired, so those cultivars are free to propagate and sell. The next of the 4 still protected comes off patent on March 31, 2036.
Still under patent — 4 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Summer's SurrenderPP28475Vernonia plant named ‘Summer's Surrender’UNDER PATENTMarch 31, 2036
- Summer's Swan SongPP28556Vernonia plant named ‘Summer's Swan Song’UNDER PATENTApril 5, 2036
- Summer's EndPP33602Vernonia plant named ‘Summer's End’UNDER PATENTDecember 23, 2040
- Prairie PrincessPP36918Vernonia plant named ‘Prairie Princess’UNDER PATENTJuly 25, 2044
Botanically this is Vernonia. 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.