It might be more trouble then it's worth since container soil freezes harder which could kill the plant. But if you have a heated garage or basement and water throughout the winter they just might make it, but they need to be hardened off before resetting them outside in the spring before the buds break.

Here is a link that might be useful: Propagating Perennials

Actually lots of people do it (or at least try) over on the container forum. I linked to a current thread below, it's about trees in containers in general. But try searching for posts in container gardening and you'll find lots of info.

Here is a link that might be useful: Trees in Containers thread