729zoom, Check out some pictures of large Lady Banks. She can get really, REALLY large.So you could easily site her 10 feet from the shed and train the emerging canes onto the shed. I really think for a rose that large, more than a whisky barrel's worth of room is needed.

FWIW, according to photographer Caroline Parker of Rose Notes: "'Common Moss' [Rosa centifolia muscosa] does very well in pots. The two shown in the [linked] picture: http://rosenotes.typepad.com/.a/6a010535bf3807970c01156ef0b7ca970c-pi  have been in those pots for twenty years. If they mildew, I’ll cut them back once or twice in a season. New leaves generate quickly. Since the rose blooms once, it receives one dose of fertilizer as new leaves emerge in spring." See also: http://www.rosenotes.com/2009/04/rose-of-the-week-moss-rose.html Common moss is a sport of Rosa centifolia, which was grown extensively in Southern France for perfume (in the form of rose oil, presumably). Parker lives in San Francisco, I believe. Some clones may be smaller and even more amenable to pot culture.

I saw this Australian tree fern in a greenhouse about 50 miles from me. I had thought you could'nt grow them in containers, but, they are here in a pot for sale, so could I keep 1 in a container over the winter in my basement? I'm in zone 6 Pa, so obviously can't put them in the ground.

Rebecca, lots of great advice for you here! Growing in containers is very different than in the ground. I had lots of challenges with mine, even after 40 years of growing tons of roses in the ground. Like others, I've found there's no need for gravel if you add plenty of perlite, make sure there are enough drainage holes, and elevate the pots. You will need to repot; the roses will tell you when by slowing down rate of growth/bloom. Potted roses need liquid fertilizer due to being in a soil-less mix.; there's an excellent explanation on the container forum about why. They need to be fed more often than roses in the ground. In my very hot climate, a good layer of mulch helps conserve moisture. Now I only buy light colored containers; the few darker ones are tucked behind them to protect them from strong afternoon sun. And with all that, some roses just seem to hate being in containers. I've sent a few to new homes for that reason!