Plant
Asparagus
23 US plant patents name this plant. 21 have expired, so those cultivars are free to propagate and sell. The next of the 2 still protected comes off patent on November 10, 2037.
Still under patent — 2 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
Already in the public domain — 21 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.
- NJ44PPP18409Asparagus plant named ‘NJ44P’PUBLIC DOMAINMay 10, 2026
- Jersey JewelPP8222Asparagus plant named `Jersey Jewel`PUBLIC DOMAINNovember 15, 2011
- AustinPP8318Asparagus plant named AustinPUBLIC DOMAINNovember 15, 2011
- Asparagus plantPP7311PUBLIC DOMAINAugust 11, 2009
- Jersey PrincessPP7155Asparagus plant named `Jersey Princess`PUBLIC DOMAINDecember 7, 2008
- Jersey GeneralPP6965Asparagus plant -- `Jersey General`PUBLIC DOMAINFebruary 24, 2008
- TaraPP6966Asparagus plant--`Tara`PUBLIC DOMAINFebruary 24, 2008
- LouisePP6967Asparagus plant--`Louise`PUBLIC DOMAINFebruary 24, 2008
- KathrynPP6968Asparagus plant--`Kathryn`PUBLIC DOMAINFebruary 24, 2008
- Jersey TitanPP6969Asparagus plant--`Jersey Titan`PUBLIC DOMAINFebruary 24, 2008
- Jersey GemPP6970Asparagus plant--Jersey GemPUBLIC DOMAINFebruary 24, 2008
- LindaPP6622Asparagus plant named LindaPUBLIC DOMAINJuly 6, 2007
- Jersey JadePP6623Asparagus plant named Jersey JadePUBLIC DOMAINJuly 6, 2007
- Jersey KnightPP6624Asparagus plant named Jersey KnightPUBLIC DOMAINJuly 6, 2007
- Discovered and asexually reproduced a certain new and distinct variety of asparagus plantPP5652PUBLIC DOMAINOctober 21, 2003
- Scott HowardPP5549Asparagus plantPUBLIC DOMAINOctober 5, 2003
- M138PP5316Asparagus plant--M138PUBLIC DOMAINFebruary 18, 2003
- F189PP5317Asparagus plant--F189PUBLIC DOMAINFebruary 18, 2003
- Asparagus plantPP5187PUBLIC DOMAINJanuary 31, 2001
- Asparagus plantPP4675PUBLIC DOMAINDecember 19, 1999
- Asparagus plantPP4677PUBLIC DOMAINDecember 19, 1999
Botanically this is Asparagus. 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.