So, I keep my Sarrs in their tubs in my tuck-under garage on a shelf. In addition to being part of the basement, which adds heat to it, I have a 1/4 hp aquarium chiller in there that adds heat from my highland growroom. Typically the garage doesn't freeze, however... I went in yesterday evening to find ice in the Sarrs' buckets. Clearly the leaves also froze and some of the soil. This will be the first time I've frozen my Sarrs. I've moved them to my seasonal growroom where my tuberous dews live, to prevent further freezing (it'll be -29C again tonight). I think they are all going to pull through. I trimmed the old pitchers last night after the discovery, which meant I brought them into the finished part of the basement, and they thawed. The only one that looked rough was my S. minor from Berkeley Co., South Carolina. It was clearly not happy about the freeze. I was pretty worried about my S. flava 'Waccamaw' which took years to get and would be not only challenging to replace, but expensive if I did. Here's hoping they all pull through.