Thanks matt. I really meant, do you have to give it extra feed and water more often because it is in dry soil? Or isn't it? I put a largeish conifer in a pot near my summerhouse last year and over the winter it died, despite all the rain. I'd had it for years and realised that I had really miscalculated how much rain it would get. I water pots in the summer but not in winter.
Anyway, back to roses. There are some super-vigorous roses, which grow fast but also grow pretty large and you have to take this into acount when you plan where they will go. Careful thought is needed, especially about how they will be supported.