Plant
Rhododendron
87 US plant patents name this plant. 17 have expired, so those cultivars are free to propagate and sell. The next of the 70 still protected comes off patent on April 14, 2028.
Still under patent — 70 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- Rhodunter 149PP20749Rhododendron rootstock named ‘Rhodunter 149’UNDER PATENTApril 14, 2028
- Hort200101PP20706Rhododendron plant named ‘Hort200101’UNDER PATENTJuly 23, 2028
- Hort200001PP20726Rhododendron plant named ‘Hort200001’UNDER PATENTJuly 23, 2028
- FujiPP21160Rhododendron plant named ‘Fuji’UNDER PATENTApril 20, 2029
- HORT01PP21982Rhododendron plant named ‘HORT01’UNDER PATENTNovember 12, 2029
- FarrowPP22209Rhododendron Plant named ‘Farrow’UNDER PATENTSeptember 14, 2030
- Rhodunter 150PP25235Rhododendron rootstock named ‘Rhodunter 150’UNDER PATENTOctober 30, 2032
- ROBLETPP25072Rhododendron plant named ‘ROBLET’UNDER PATENTJanuary 7, 2033
- ROBLEUPP25074Rhododendron plant named ‘ROBLEU’UNDER PATENTJanuary 7, 2033
- JulonsoPP25306Rhododendron indicum plant named ‘Julonso’UNDER PATENTApril 11, 2033
- HORT09PP25576Rhododendron plant named ‘HORT09’UNDER PATENTSeptember 20, 2033
- HOMLEBPP26038Rhododendron plant named ‘HOMLEB’UNDER PATENTApril 23, 2034
- HOMLECPP26277Rhododendron plant named ‘HOMLEC’UNDER PATENTApril 23, 2034
- HOMLEDPP26303Rhododendron plant named ‘HOMLED’UNDER PATENTApril 23, 2034
- HOMLEEPP26304Rhododendron plant named ‘HOMLEE’UNDER PATENTApril 23, 2034
- HOMLEAPP26037Rhododendron plant named ‘HOMLEA’UNDER PATENTApril 26, 2034
- UMNAZ 502PP26601Rhododendron plant named ‘UMNAZ 502’UNDER PATENTJune 30, 2034
- UMNAZ 493PP26600Rhododendron plant named ‘UMNAZ 493’UNDER PATENTJuly 4, 2034
- QBACKBPP27083Rhododendron plant named ‘QBACKB’UNDER PATENTSeptember 24, 2034
- QBackAPP27082Rhododendron plant named ‘QBackA’UNDER PATENTSeptember 25, 2034
- WALPINRUFPP26544Rhododendron plant named ‘WALPINRUF’UNDER PATENTOctober 3, 2034
- WALSANBARBPP26545Rhododendron plant named ‘WALSANBARB’UNDER PATENTOctober 7, 2034
- WALSNOWRUFPP26996Rhododendron plant named ‘WALSNOWRUF’UNDER PATENTNovember 11, 2034
- LavJ2011PP26976Rhododendron plant named ‘LavJ2011’UNDER PATENTDecember 7, 2034
- PJM Elite StarPP27780Rhododendron plant named ‘PJM Elite Star’UNDER PATENTJune 15, 2035
- Microhirs3PP28473Rhododendron plant named ‘Microhirs3’UNDER PATENTSeptember 15, 2035
- ROBLEZPP28279Rhododendron plant named ‘ROBLEZ’UNDER PATENTOctober 20, 2035
- BAILEAPP28097Rhododendron plant named ‘BAILEA’UNDER PATENTDecember 31, 2035
- BAILECPP28727Rhododendron plant named ‘BAILEC’UNDER PATENTFebruary 17, 2036
- BAILEBPP28728Rhododendron plant named ‘BAILEB’UNDER PATENTFebruary 17, 2036
- HORT12PP28050Rhododendron plant named ‘HORT12’UNDER PATENTMarch 23, 2036
- HORT13PP28061Rhododendron plant named ‘HORT13’UNDER PATENTMarch 23, 2036
- HORT14PP28083Rhododendron plant named ‘HORT14’UNDER PATENTMarch 23, 2036
- WHA01PP28972Rhododendron plant named ‘WHA01’UNDER PATENTAugust 18, 2036
- MFARSSPP28697Rhododendron ‘MFARSS’UNDER PATENTAugust 29, 2036
- ROBLEZAPP29770Rhododendron plant named ‘ROBLEZA’UNDER PATENTSeptember 19, 2037
- HOLDEN52PP30235Rhododendron plant named ‘HOLDEN52’UNDER PATENTSeptember 19, 2037
- NCRX1PP31150Rhododendron plant named ‘NCRX1’UNDER PATENTAugust 16, 2038
- NCRX2PP31898Rhododendron plant named ‘NCRX2’UNDER PATENTMarch 28, 2039
- KuraangelPP32314Rhododendron plant named ‘Kuraangel’UNDER PATENTMarch 28, 2039
- KurachouchouPP32315Rhododendron plant named ‘Kurachouchou’UNDER PATENTMarch 28, 2039
- TritonPP32356Rhododendron plant named ‘Triton’UNDER PATENTMarch 28, 2039
- KurachiffonPP32398Rhododendron plant named ‘Kurachiffon’UNDER PATENTMarch 28, 2039
- NCRX3PP32819Rhododendron plant named ‘NCRX3’UNDER PATENTNovember 12, 2039
- ROBLEZEPP32506Rhododendron plant named ‘ROBLEZE’UNDER PATENTDecember 10, 2039
- ROBLEZFPP32507Rhododendron plant named ‘ROBLEZF’UNDER PATENTDecember 10, 2039
- ROBLEZDPP32967Rhododendron plant named ‘ROBLEZD’UNDER PATENTDecember 10, 2039
- Microhirs9PP32968Rhododendron plant named ‘Microhirs9’UNDER PATENTJuly 14, 2040
- HoldenRhodo201PP33594Rhododendron plant named ‘HoldenRhodo201’UNDER PATENTOctober 6, 2040
- Royal ResiliencePP33702Rhododendron plant named ‘Royal Resilience’UNDER PATENTMarch 22, 2041
- UMNAZ633PP33787Rhododendron plant named ‘UMNAZ633’UNDER PATENTApril 8, 2041
- Spring MatePP34194Rhododendron plant named ‘Spring Mate’UNDER PATENTOctober 21, 2041
- HoldenRhodo214PP34542Rhododendron plant named ‘HoldenRhodo214’UNDER PATENTDecember 14, 2041
- HoldenRhodo213PP34540Rhododendron plant named ‘HoldenRhodo213’UNDER PATENTDecember 27, 2041
- HoldenRhodo212PP34541Rhododendron plant named ‘HoldenRhodo212’UNDER PATENTDecember 27, 2041
- HoldenRhodo211PP34628Rhododendron plant named ‘HoldenRhodo211’UNDER PATENTDecember 27, 2041
- NCRX10PP35049Rhododendron plant ‘NCRX10’UNDER PATENTJune 21, 2042
- NCRX9PP35072Rhododendron plant ‘NCRX9’UNDER PATENTJune 21, 2042
- NCRX11PP35082Rhododendron plant named ‘NCRX11’UNDER PATENTJune 21, 2042
- AZAARE01PP35920Rhododendron plant named ‘AZAARE01’UNDER PATENTJanuary 24, 2043
- AZAARE02PP35921Rhododendron plant named ‘AZAARE02’UNDER PATENTJanuary 24, 2043
- AZAARE03PP36091Rhododendron plant named ‘AZAARE03’UNDER PATENTJanuary 24, 2043
- HoldenRhodo221PP35416Rhododendron plant named ‘HoldenRhodo221’UNDER PATENTFebruary 9, 2043
- NCRX12PP36323Rhododendron plant named ‘NCRX12’UNDER PATENTJune 17, 2044
- ROBLEZOPP36693Rhododendron plant named ‘ROBLEZO’UNDER PATENTNovember 4, 2044
- ROBLEZNPP36758Rhododendron plant named ‘ROBLEZN’UNDER PATENTNovember 4, 2044
- ROBLEZGPP36875Rhododendron plant named ‘ROBLEZG’UNDER PATENTNovember 4, 2044
- ROBLEZPPP36883Rhododendron plant named ‘ROBLEZP’UNDER PATENTNovember 4, 2044
- NCB193PP36914Rhododendron plant named ‘NCB193’UNDER PATENTDecember 2, 2044
- NCB195PP36915Rhododendron plant named ‘NCB195’UNDER PATENTDecember 2, 2044
Already in the public domain — 17 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.
- PJM Pink DelightPP18328Rhododendron plant named ‘PJM Pink Delight’PUBLIC DOMAINJune 12, 2026
- Christine SienaPP16273Rhododendron plant named ‘Christine Siena’PUBLIC DOMAINJune 1, 2025
- CarmenPP16839Rhododendron plant named ‘Carmen’PUBLIC DOMAINMay 5, 2025
- Kinku SakuPP17177Rhododendron plant named ‘Kinku Saku’PUBLIC DOMAINMarch 5, 2025
- Christine BelliPP17166Rhododendron plant named ‘Christine Belli’PUBLIC DOMAINFebruary 14, 2025
- Classic RougePP16338Rhododendron plant named ‘Classic Rouge’PUBLIC DOMAINJuly 5, 2024
- Rhodunter 37PP15940Rhododendron rootstock named ‘Rhodunter 37’PUBLIC DOMAINOctober 11, 2022
- Rhodunter 48PP15967Rhododendron rootstock named ‘Rhodunter 48’PUBLIC DOMAINOctober 11, 2022
- AngelinaPP12693Rhododendron plant named ‘Angelina’PUBLIC DOMAINFebruary 8, 2021
- Amy CottaPP11311Rhododendron plant named `Amy Cotta`PUBLIC DOMAINJune 29, 2018
- Northern StarburstPP10388Rhododendron plant named `Northern Starburst`PUBLIC DOMAINOctober 16, 2016
- Purple PassionPP9981Rhododendron plant named `Purple Passion`PUBLIC DOMAINMay 22, 2016
- IrvsmartPP6898Rhododendron plane--Irvsmart varietyPUBLIC DOMAINApril 19, 2008
- Scented SpringtimePP6629Rhododendron plant `Scented Springtime`PUBLIC DOMAINOctober 16, 2007
- SammetglutPP6026Rhododendron plant--Sammetglut varietyPUBLIC DOMAINSeptember 29, 2004
- GoldilocksPP5149Rhododendron plant `Goldilocks`PUBLIC DOMAINMarch 22, 2002
- HacputPP4905Rhododendron plant--Hacput varietyPUBLIC DOMAINJune 25, 2000
Botanically this is Rhododendron. A patent expiring frees the plant, and its cultivar name with it — cultivar names cannot be trademarked. Any brand name it is sold under is a separate thing and may still be owned.