My garden is located on the border of USDA Zone 9a/9b meaning the average winter low is about 25F, -4C. However, during a cold winter, we can get to 20F, -7C. We do have frost every winter, but I have Phoenix roebellenii growing up near the house (though they defoliated a couple years ago). I've always considered my zone too cold for ANY Attalea, but after reading here a bit, I wonder about A. cohune, and a couple others. So, I solicit your experiences.