I'm not entirely sure what conditions they're in, but the nursery is in South Carolina. The winters there are less severe by at least 10°. I imagine they have greenhouses, which I've considered myself. Anyone have any experience with overwintering in a cold frame? I'm trying to get an idea of how much warmer it could actually be. Around here the absolute lowest temps are in the low single digits, but I'd like the plants to stay around 20° at the lowest.
