Don't take any chances Brian, I am south of you and when it gets in 30s, it stays there for only a few hours and then we are back up to 50-70, last year I had no damage and no frost. Luckily, we have been in the 60s at night and middle 80s daytime (most of the time). This year, I keep mine in a small plastic enclosure since I have some hard to get cuttings. You live close to Frank FMD and Jimmie JD, I believe Leon and Jefferson? so contact them and see what they do in your area. Good luck and good growing.