Posted: 12/10/2014 at 11:32
You can hard prune both clematis, they actually enjoy a hard prune and as long as you give them a good mulch after pruning they will shoot away next spring. My montana was done late last year and has come back to half the size this year alone. So don't worry about them.
As for the rose, have a look at the youtube video below, it's very good and suits any climbing rose.