Thank you for your replies!
Erik, I hope I converted -23.8C to F correctly...that should be -11F! I used google
It's good your chammy is back, and it's nice to be able to use heat. I don't use it because there's a danger in using the electricity - you never know when the power outage is going to happen. As for w. filifera - you should definately give them a shot!
Rob, I do have the pics of the boxes, I'll post them as soon as I find them on my old laptop. I hope your palms grow good and healthy!
Bill, thanks! We usually drop low wnen the Siberian High comes without an invitation, and it's usually pushed away in a day or two. On average, there's 3 to 5 nights in winter when the lows are extreme (below -13C or so). But this winter has been a very cold one, we got two like weeks (13 days to be correct) below freezing, starting with -1/-3 C, and then it went all the way down to -23.8C one night, and not rising above -17 next day. A real killer and a lot of lost grapevines and peach trees this year.
During the previous cold spell my trachy survived -15C with no protection and no damage. Here's a pic of it after -15C w/ no protection:
