Hey everyone, I was just wondering if anyone knows of where the harshest (coldest) locations are that people are growing palms (protected or not) outdoors with some success? Im guessing that it would probably be needles, or Sabal minors, or trachies.... Id be very interested in hearing about the winter protection techniques.
The coldest I've read of is Trachycarpus fortunei in Plovdiv, Bulgaria, surviving -27.5°C on 6 Jan 1993.
If you buy a copy of Palms Won't Grow Here and other Myths by David A. Francko you'll find he has experimented with several species, as well as other tropicals, in Ohio with success. His work was done at an Ohio University. Interesting book! And it can get quite cold in Ohio! His book is available via Amazon.