Genus
Lamium
8 US plant patents have been granted in this genus. 4 are already in the public domain — anyone may propagate and sell them. The next of the 4 still protected comes off patent on November 25, 2028.
Still under patent — 4 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Lemon FrostPP20723Lamium maculatum plant named ‘Lemon Frost’UNDER PATENTNovember 25, 2028
- NonnogardkPP33342Lamium plant named ‘Nonnogardk’UNDER PATENTSeptember 26, 2040
- Orchid Frost GrandePP33573Lamium plant named ‘Orchid Frost Grande’UNDER PATENTFebruary 25, 2041
- Orchid Frost GoldPP33574Lamium plant named ‘Orchid Frost Gold’UNDER PATENTFebruary 25, 2041
Already in the public domain — 4 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.
- CheckinPP17925Lamium plant named ‘Checkin’PUBLIC DOMAINFebruary 7, 2026
- Purple DragonPP15890Lamium maculatum ‘Purple Dragon’PUBLIC DOMAINMay 15, 2022
- DellamPP11783Lamium plant named ‘Dellam’PUBLIC DOMAINJune 9, 2019
- Orchid FrostPP11122Lamium plant named `Orchid Frost`PUBLIC DOMAINMarch 11, 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.