Hardy Palm and Subtropical Board
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Re: Colder than January
Here in Delaware, the lowest low in the 7-day is Saturday night/Sunday morning when the call is for 28F. I think it'll actually come in at 29F/30F.
The lowest high is next Wednesday: 42F.
Our average January high/low is 40F/23F, so we'll be in the neighborhood. I think mid February would be a better match.
Novembers in this region are volatile. On the 2nd, the high/low was 72F/58F. Last year, on the 11th of the month, we had a freak low of 20F, which actually damaged a LOT of plants, including woody, bulletproof hardy plants that hadn't fully hardened off for winter. It played havoc with my Photinia, which takes winter cold like a pro, as long as it happens IN WINTER, but, driving out and about, THE species most affected was Japanese Maple. Very few of them had actually shed their leaves when the 20F night came. The result was the leaves were killed -- browned out -- but they were STUCK TO THE TREES. They didn't fall off. Many stayed like this until spring. Never saw anything like it.
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