Well, I give up. In zone 8 it can get to 15°. ( lowest I've seen in the 8° years I've lived here) They are very hard to start too. No dyzzy, the minnow pond i was going to grow it in is only 30' across, but I can see it from my kitchen, and thought I could get a couple of pads in there. That is a alligator, but he is in my 1/3 acre fish pond. Last year when he arrived there he was 5', and I freaked out. Gator guy never could find him in 10 days he had a permit. I did find out he is just as afraid of me, and swims away. So, if he is still there this year, and willing to stay on the other side of the pond, I can live with that. He is welcome to all the turtles and snakes he can eat. (Alligators like floating food) I feel bad that killing him is the only option if he is considered dangerous. And swimming towards a person is deemed dangerous.
