Could someone please help me, a very inexperienced gardener, with questions about my established Lemon Bells clematis? When and how hard should I prune it? The tag information says it blooms on the previous season's wood. One year I pruned it and got no blooms for 2 years after. I would like to clean it up as it looks awful right now. Also, my neighbour brought over 3 assorted clematis in pots. I will not have a place to plant them until the spring - is it OK to keep them in pots in a sheltered spot over the winter? Many thanks!