Well, I can tell you from experience they die without water! lol
I planted some 4" pots of them by my mailbox this past spring, and they were doing great (morning sun only) until it just got too hot for them. I didn't water them near enough for the heat they were experiencing.
I did have one in a pot last summer that did really well in a gallon pot. The dogs knocked the pot over one too many times though.
