Pruning Group 1

This group includes all spring flowering varieties that flower on last years' growth. These varieties include C. montana, C. alpina, C. macropetala, C. armandii and C. cartmanii.
Group one clematis generally do not require pruning except to keep tidy and free of dead wood.

Prune after flowering, usually in late spring.
Cut out all weak and dead growth and generally tidy up the plant. If the plant is sparse, prune harder to encourage branching.
If the vine is growing in the wrong direction, prune that bit off at anytime, however new shoots from anything pruned off after February will not flower the following spring.
Feed after flowering to encourage new growth.