Pruning Clematis vines?
I have a Clematis vine that is somewhat out of control. I have it planted against some plastic latice work and it has gotten so top heavy it is pulling the top over. We want to put some extensions on the 4x4's to anchor the top, but I may have to cut it back. The outside leaves are still green but everything underneath is very brittle and dead looking. I'm not sure what kind they are any more and I'm scared to death that I'll kill it if I prune it real heavy. Is this the right time of year and what would happen if I just took the hedge trimmers and shaved the whole front of it off? We live in zone 4/5. If anyone out there has dealt with this kind of heavy pruning, please advise! Thanks!