Hardy Palm and Subtropical Board
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There are just so many possibilities for why we see fossilized palms in places where they shouldn't be. The most obvious, that the climate was way warmer then. And that's probably a homerun. That's probably THE main reason. But there are other explanations that might be true. What if the palms we see fossilized were hardier than today's palms? What if, over the millennia, hardiness lessened in certain species?
One can go crazy going down these various mental rabbit holes.
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