Hardy Palm and Subtropical Board
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Re: Subtropical vs Temperate limits
Provenance / ecotypes. Much discussed on this board, but mostly in years past. Not so much anymore.
Here's actual experience in my back yard...
Sabal Palmetto 'Bald Head Island'
Lived through one winter. The 2nd killed it.
Sabal Palmetto 'Port Orange'
Alive, in my yard since 2007.
Also growing Sabal Minor 'Hatteras' and 'McCurtain'. The latter is billed as the hardiest ecotype available, and it fared much better this last winter than the 'Hatteras.' But, some years, the 'Hatteras' does better. And other years, it's a tie. Overall, with 11.5 years in the ground, I'd say they are equally hardy. But, perhaps one takes durational cold best while the other takes winter minima best. They could each specialize in different kinds of hardiness.
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