Genus
Ligularia
10 US plant patents have been granted in this genus. 3 are already in the public domain — anyone may propagate and sell them. The next of the 7 still protected comes off patent on September 25, 2027.
Still under patent — 7 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Osiris FantaisiePP19302Ligularia plant named ‘Osiris Fantaisie’UNDER PATENTSeptember 25, 2027
- Last DancePP20947Ligularia plant named ‘Last Dance’UNDER PATENTDecember 3, 2028
- Osiris Cafe NoirPP21351Ligularia plant named ‘Osiris Cafe Noir’UNDER PATENTSeptember 16, 2029
- Bottle RocketPP24486Ligularia plant named ‘Bottle Rocket’UNDER PATENTAugust 3, 2032
- King KongPP29461Ligularia plant named ‘King Kong’UNDER PATENTSeptember 12, 2036
- Little Golden RayPP31911Ligularia plant named ‘Little Golden Ray’UNDER PATENTApril 25, 2039
- Big Green TractorPP35810Ligularia plant named ‘Big Green Tractor’UNDER PATENTApril 26, 2043
Already in the public domain — 3 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.
- LaternchenPP16026Ligularia plant named ‘Laternchen’PUBLIC DOMAINSeptember 24, 2024
- Britt-Marie CrawfordPP16113Ligularia plant named ‘Britt-Marie Crawford’PUBLIC DOMAINOctober 16, 2023
- Little RocketPP14621Ligularia plant named ‘Little Rocket’PUBLIC DOMAINMay 13, 2023
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.