You may remember Graham Thomas, a climbing rose that I bought three years ago from the Antique Rose Emporium. I was uncertain at the time whether it would survive winters in a container. But it's hardy to zone 5 (I'm in zone 7) and I planted it in quite a large pot. My worries were unfounded--it bounces back every year. I hardly do anything to it. This spring, I just cut back any branch that was brown. I also added more potting soil, some time-release fertilizer, and some Vermont Container Booster. That's about all the effort I'm willing to expend. The rest is up to the plant. I'd say Graham Thomas is faring quite well.