Hardy Palm and Subtropical Board
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Re: Subtropical vs Temperate limits
Yes. Virginia Beach. I've seen climate maps that include the Cape May Peninsula of New Jersey, but I don't put any credence in that idea. By definition, the cape is 7b. While cultivated plantings of Needles & Minors are long-term survivors there, you don't see any palms naturalizing there, or Live Oak or Spanish Moss. Aside from winter cold, there is no other reason precluding the spread of these plants, therefore, no place in NJ is subtropical.
Jim, Wilmington, DE, 7a
Last 30 Years Avg. Winter Low: 7.50F
Last 20 Years Avg. Winter Low: 8.35F
Last 10 Years Avg. Winter Low: 8.40F
Favorite Palms: Species: Phoenix Canariensis / Genus: Sabal