How best to prune this one?
This is 1 of 2 existing clematis I have in my garden. As you can see, I've shamefully neglected this one. I have no idea what it is called but I did buy it probably 5 years ago. I just let it run wild and as you can see the little metal trellis it is climbing on is not adequate. It vined up one side and is now flopped over the other side but I have alot of bare wood vine showing for at least 2 feet if not more.
I bought a 6ft wooden trellis to replace the metal one. Since the vines are all tangled up in the metal trellis, as well as on itself, could I just cut this back? If so, how far up from the ground should I cut? I was planning on doing the pruning in the spring around March. It is still blooming here.
Thanks for any advice you can offer.
Pic of blooms which start around end of May and continue until we have a hard frost.