Genus
Dianella
19 US plant patents have been granted in this genus. 9 are already in the public domain — anyone may propagate and sell them. The next of the 10 still protected comes off patent on January 24, 2027.
On the name: Filed as Dianella. GBIF marks this name's backbone entry as unresolved; the genus itself is not in dispute.
Still under patent — 10 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- TAS100PP19338Dianella plant named ‘TAS100’UNDER PATENTJanuary 24, 2027
- Dinky DiPP20902Dianella plant named ‘Dinky Di’UNDER PATENTNovember 15, 2027
- John 316PP20794Dianella caerulea plant named ‘John 316’UNDER PATENTFebruary 15, 2028
- DPV308PP21281Dianella prunina plant named ‘DPV308’UNDER PATENTApril 23, 2029
- TAS300PP22196Dianella tasmanica plant names ‘TAS300’UNDER PATENTFebruary 13, 2030
- NPW2PP23084Dianella tasmanica plant named ‘NPW2’UNDER PATENTMay 28, 2030
- Allyn-CitationPP22965Dianella plant named ‘Allyn-Citation’UNDER PATENTJuly 30, 2030
- FortunegoldPP25148Dianella plant named ‘Fortunegold’UNDER PATENTJuly 15, 2033
- DCGLPP26941Dianella caerulea plant named ‘DCGL’UNDER PATENTOctober 3, 2034
- DP401PP27348Dianella hybrid plant named ‘DP401’UNDER PATENTJanuary 6, 2035
Already in the public domain — 9 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.
- DT23PP19253Dianella tasmanica plant named ‘DT23’PUBLIC DOMAINAugust 29, 2026
- DTN03PP18883Dianella revoluta plant named ‘DTN03’PUBLIC DOMAINApril 7, 2026
- DCNCOPP18505Dianella caerulea plant named ‘DCNCO’PUBLIC DOMAINOctober 26, 2025
- DBB03PP17998Dianella caerulea plant named ‘DBB03’PUBLIC DOMAINSeptember 29, 2025
- DCMP01PP18452Dianella caerulea plant named ‘DCMP01’PUBLIC DOMAINSeptember 29, 2025
- DRG04PP18454Dianella revoluta plant named ‘DRG04’PUBLIC DOMAINSeptember 29, 2025
- TR20PP18737Dianella tasmanica plant named ‘TR20’PUBLIC DOMAINSeptember 29, 2025
- DR5000PP17719Dianella revoluta plant named ‘DR5000’PUBLIC DOMAINFebruary 26, 2025
- SOUGOLDPP13705Dianella plant named ‘SOUGOLD’PUBLIC DOMAINMay 8, 2021
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.