Genus
Solidago
14 US plant patents have been granted in this genus. 10 are already in the public domain — anyone may propagate and sell them. The next of the 4 still protected comes off patent on December 20, 2027.
Still under patent — 4 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- KLESH06001PP19861Solidago plant named ‘KLESH06001’UNDER PATENTDecember 20, 2027
- KLESH13014PP25430Solidago plant named ‘KLESH13014’UNDER PATENTNovember 7, 2033
- BARSOLMAGPP29086Solidago plant named ‘BARSOLMAG’UNDER PATENTOctober 22, 2036
- Sugar KissesPP34747Solidago plant named ‘Sugar Kisses’UNDER PATENTFebruary 22, 2042
Already in the public domain — 10 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.
- DansolitlemPP17297Solidago plant named ‘Dansolitlem’PUBLIC DOMAINAugust 17, 2025
- Dansol21PP17148Solidago plant named ‘Dansol21’PUBLIC DOMAINAugust 12, 2025
- DansolwindPP17076Solidago plant named ‘Dansolwind’PUBLIC DOMAINMarch 2, 2025
- SolbutPP16003Solidago plant named ‘Solbut’PUBLIC DOMAINSeptember 27, 2024
- PlutonPP15913Solidago plant named ‘Pluton’PUBLIC DOMAINSeptember 10, 2024
- BareightPP12525Solidago plant named ‘Bareight’PUBLIC DOMAINSeptember 5, 2020
- DansosoloPP12137Solidago plant named ‘Dansosolo’PUBLIC DOMAINJune 1, 2019
- DansolgoldPP12170Solidago plant named ‘Dansolgold’PUBLIC DOMAINJune 1, 2019
- BarsevenPP11316Solidago plant named `Barseven`PUBLIC DOMAINSeptember 3, 2018
- Yellow SubmarinePP8710Solidago plant named Yellow SubmarinePUBLIC DOMAINJuly 6, 2013
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.