Clematis that flower in late summer, including C. viticella and C. texensis, are in Pruning Group 3. This means that they need regular pruning, in February or March - just cut back all of the stems to 30cm above ground.
Find out more about how to prune Group 3 clematis.
Pruning regularly will ensure that you can enjoy flowers at eye level, rather than them all appearing towards the top of the plant. It will also prevent a tangled mass of stems.
Here are 10 beautiful Group 3 clematis to grow.