Hi. I just planted two Angel Trumpet plants purchased from a nursery. They arrived (mail delivery) in great shape. I'm in Allentown PA. I placed them in large patio containers and thought winter had finally given up the ghost. Unfortunately, I was caught by surprise by a nasty overnight freeze last week while out of town. The new growth on the plants was killed, and I am trying to figure out whether or not the plants can be salvaged. I've no experience with these plants and don't know what kind of abuse they can take. Can anyone help?