When To Prune Clematis.

The modern thinking for pruning clematis is "Flowers in spring- don’t do a thing"
What this means is that spring flowering clematis can be left unpruned.
Should you have need to, overgrown Clematis montana types can be cut back as hard as you like as soon as the flowers fall.
Large flowered Summer and fall flowered types,such as "The President","Ville de Lyon" and " Mrs Cholmondly , must be cut down to about a foot from the ground each year in early Spring.