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This plant is said to grow outdoors in the following regions:
Chicago, Illinois
Durham, Maine
Norristown, Pennsylvania
Update 2015: T. 'Oxford' is awarded with the Award of Garden Merit (AGM) from the British Royal Horticultural Society since 1993 (AGM tul...Read Moreips 2015 list). Hybridized by D.W. Lefeber & Co, 1945.
Update 2015: T. 'Oxford' is awarded with the Award of Garden Merit (AGM) from the British Royal Horticultural Society since 1993 (AGM tul...Read More