Group 3 Clematis
These are clematis that bloom on new wood (the current year's growth).
Pruning Group 3 Clematis
Pruning group 3 clematis should be done in late winter or early spring. This ensures you don't cut off any flower buds that are about to bloom. And also encourages the vines to put their energy into creating more vines and foliage rather than energy towards the flowers.