Have I cold shocked my new plant? I bought this guy about a week ago and he was in the car in ~50 degree weather for a few hours. Since then, he’s lost about half of his leaves- they’re just falling off with the stems attached. Looks like the leaf stems are rotting, although I’ve inspected the whole plant, including the roots, and I’ve seen no pests or rot anywhere. Help! Edit: I have transferred him into water. Hopefully he will do ok.