The process is almost the opposite of pruning Group 2 plants. Group 3 Clematis include the later flowering clematis, whether they be large-flowered hybrids such as Gipsy Queen or the smaller viticellas, orientalis, tangutica and texensis groups. The process is almost the opposite of pruning Group 2 plants. If desired, they can be left unpruned to scramble over pergolas where space is not limited. If you’re not sure which group your clematis belongs to, let it flower, take note of when it blooms and what kind of flower it produces, and prune … Prune Hard - Group 3 - Larger sized flowers You can order at any time and your plants will be delivered to you at the best time for planting. They flower themselves into the ground. Clematis Pruning Group 3. Prune just above that. times, RHS Registered Charity no. Prune Group 3 clematis in February in the South and in early March in the North. If no pruning is done, clematis species and cultivars will continue to grow and flower -- but they may become unmanageable vines. On your clematis you want to find a node (also called a leave axil bud) which is a joint on the stem where buds begin to branch out. Sign up to our newsletter for a 5 year guarantee. If young clematis plants are left unpruned they often produce very long single stems with the flowers produced only at the very top. The late Christopher Lloyd who was a great clematis man and wrote one of the definitive works on the subject walked me round his garden at Great Dixter in about 1988 or '89. Group 3, summer and fall bloomers: This group grows on new wood and flowers in late summer into fall. Instead of starting at the top of each growth and working down, you start at ground level and work up until you reach the first pair of good, strong buds. viticella 'Purpurea Plena Elegans'. (30 cm) above ground level before growth begins in early spring. Unless the plant already has three or four healthy stems growing from the base, all newly planted clematis should be pruned back hard the first spring after planting.