Clematis Montana Rubens
I am looking for some advice. I have 7 or 8 Clematis Montana and they form a hedge of approximately 20 metre long. The hedge is about 20 years old, the branches are like a birds nest and we are not getting many flowers. I have decided to remove all of the hedge and start again. I have cut 4 of the plants branches off about 30cm. from the base and already after a couple of weeks I am getting growth from them. My question is, should I remove the roots (some are 12cms. in diameter) and replace with new Montana's or should I leave the roots and train the growth?