By all means, don't give up on those blackened plants, JB! Mine got MUCH colder on my back porch and looked VERY sad, but I trimmed them up and cleaned them up and have some that are starting to come back. And some of the ones that I thought were completely dead look like they might very well come back from the roots because the roots look ok. If you have room, it's worth a try! Heh, I don't really have room, but I'm trying anyway!