Breeder
TRISTRAM DAVID
12 US plant patents, granted between 2002 and 2016.
Filed under the TRISTRAM name. Related entities are listed separately on the TRISTRAM search, because a company and a person are not the same filer even when the name matches.
Still under patent — 8 cultivars
Soonest to come off patent first. You may not propagate these for sale until the date shown.
- WalsnofouPP19376Gaura plant named ‘Walsnofou’UNDER PATENTApril 2, 2027
- WalheroPP19439Helleborus plant named ‘Walhero’UNDER PATENTApril 3, 2027
- WALEUPHGLOPP22200Euphorbia plant named ‘WALEUPHGLO’UNDER PATENTJune 30, 2030
- WALFRASTARPP23101Erysimum plant named ‘WALFRASTAR’UNDER PATENTApril 5, 2031
- WALHIROSMOPP24936Hibiscus plant named ‘WALHIROSMO’UNDER PATENTJanuary 8, 2033
- WALPINRUFPP26544Rhododendron plant named ‘WALPINRUF’UNDER PATENTOctober 3, 2034
- WALSANBARBPP26545Rhododendron plant named ‘WALSANBARB’UNDER PATENTOctober 7, 2034
- WALSNOWRUFPP26996Rhododendron plant named ‘WALSNOWRUF’UNDER PATENTNovember 11, 2034
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.
- WALBREYESPP17165Crocosmia plant named ‘WALBREYES’PUBLIC DOMAINNovember 4, 2025
- WalhelivorPP16199Helleborus plant named ‘Walhelivor’PUBLIC DOMAINAugust 20, 2024
- WalgoldalexPP13547Lysimachia plant named ‘Walgoldalex’PUBLIC DOMAINApril 25, 2021
- WalveraPP13091Lavandula plant named ‘Walvera’PUBLIC DOMAINMarch 13, 2021