Hardy Palm and Subtropical Board
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Posted by Jim Wilmington DE 7a
on 3/16/2020, 2:29 pm, in reply to "HGTV article
>> ‘McCurtain’ grows in Wichita, where it’s known to have survived temperatures of -24°F. It’s a good choice for winter gardeners in places like Ohio and Delaware who want to inject some tropical ambience into their landscapes. This variety ultimately grows to 6 feet and has a faster growth rate than other dwarf palmettos. Hardy in Zones 6b-10b. <<
I've heard about the -24F survival, but color me skeptical on that. Color me even more skeptical on the 6 feet tall thing. They don't even grow that tall IN MCCURTAIN COUNTY. They also DO NOT have "a faster growth rate than other dwarf palmettos." 'Hatteras', while maybe a little less cold hardy, is much more vigorous when it comes to growth rate (and eventual size). I say this having a specimen of each ecotype in my yard, both 13 years old.
I also disagree with the 6b rating. If I was a nurseryman, I would sell them to customers in 7b and warmer, 7a with ideal, protected siting. My experience is Sabal Minor gets absolutely lit up 1 out of every 3 winters here in 7a northern Delaware. But they do survive.
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