Yeah I had one before I grew from seed but it stayed in an unheated conservatory and I couldn't take it with me when I moved house. I was concerned about the frost but I think they grow them in Spain do you know what pollinates this family or if they can be self fertile? 

I had an american pawpaw growing in a pot but it died when I planted it in the ground as it didn't like the root disturbance. Perhaps I need to look into that again as they are hardy.