Genus
Perovskia
11 US plant patents have been granted in this genus. 1 is already in the public domain — anyone may propagate and sell it. The next of the 10 still protected comes off patent on December 29, 2028.
On the name: Filed as Perovskia. Now generally treated as a synonym of Salvia.
Still under patent — 10 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- LISSLITTPP20845Perovskia plant named ‘LISSLITT’UNDER PATENTDecember 29, 2028
- LissveryPP25581Perovskia plant named ‘Lissvery’UNDER PATENTMay 21, 2033
- CrazyBluePP25639Perovskia plant named ‘CrazyBlue’UNDER PATENTFebruary 4, 2034
- NovaperlacPP26618Perovskia plant named ‘Novaperlac’UNDER PATENTAugust 14, 2034
- RocketmanPP27526Perovskia plant named ‘Rocketman’UNDER PATENTJuly 29, 2035
- Denim 'n LacePP28445Perovskia plant named ‘Denim 'n Lace’UNDER PATENTMarch 24, 2036
- Blue Jean BabyPP29281Perovskia plant named ‘Blue Jean Baby’UNDER PATENTDecember 20, 2036
- Sage AdvicePP33310Perovskia plant named ‘Sage Advice’UNDER PATENTNovember 19, 2040
- Prime TimePP34304Perovskia plant named ‘Prime Time’UNDER PATENTFebruary 1, 2042
- DoperjelPP35270Perovskia plant named ‘Doperjel’UNDER PATENTNovember 21, 2042
Already in the public domain — 1 cultivar
Most recently freed first. Anyone may propagate and sell this plant — though the name it is sold under may still be a live trademark.
- Little SpirePP11643Perovskia plant named `Little Spire`PUBLIC DOMAINDecember 17, 2018
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.