Did I kill my banana tree?
In early June I bought a 1' banana tree and planted it in a large container. It grew beautifully, formed a 2nd pup(?) and is about 3' tall. I knew we were going to get frost last night (a low of 22), but, instead of moving it inside, I covered it with a couple of layers of sheets. Today I uncovered it and was shocked to find that the cold had penetrated the covering. The leaves are now glassy-looking and limp. Have I killed it or is there any way to save it? I read that banana trees should be allowed to go dormant, but I'm not sure this is what they meant.
Any help would be greatly appreciated.