Thea, at present, I do not have any large C&S specimens, except a tall Pencil cactus that was given to me recently. All of my other large specimen frozen a few years ago when we had a sudden arctic blast that dropped temps in the lower 20s for 3 nights in a row. I was sick with an upper respiratory infection and DH put them in the metal container after assuring me that they would not freeze. They didn't really. They melted. Still