By now,many larger flowering clematis have had their first flowers. A good tip is to remove the old flowers heads and a couple of pairs of leaves as this will induce a second flowering in August/September. Many evergreen shrubs can be clipped to shape too. As soon as Forythias, Ribes, Weigela and other spring flowering shrubs have finished flowering, it’s time to cut them back and at least trim to shape...
Clematis Group 1
Winter flowers - Alpinas, Macropetala, Armandii varieties and all the Montanas - do not prune now you will be cutting of flowering wood.
Large flowering type that flower before the end of June. These should be pruned back to a pair of good strong looking buds on each stem normally you should end up with a good network of stems between 5 and 6 feet tall.
If you have a group 2 clematis that is thin and spindly cut the whole plant down to about 9”-12” as this with thicken the plant up.
Plants that flower after the end of June. These include some of the larger flowering types - Tanquiticas, Viticellas, Texensis, all the herbaceous types. Cut the whole plant down to 12 inches don’t be afraid it will be back looking better than ever.
One other tip is always apply slug pellets around the plants after pruning (there are pet and wildlife friendly pellets available now). We have used them for some years now and are very effective.
If you are still unsure about pruning or what group your plants fall into just send and email or phone and I’ll try to help.