Posted: 28/07/2013 at 17:43
Actually, bothe of these are Group 2s which mean they start flowering end of May and June and then go quiet and then, if well fed and lightly pruned to remove all the old flower heads, will produce a second flush of flowers in late summer.
However, my garden is too cold in winter for group 2s to retain live growth above ground so I treat mine as group 3s and cut them back in March and then feed them generously with proprietary clematis food. If we get a poor spring, I also give them a liquid tonic of tomato food.
They all flower very well from late June and then I dead head where I can and they keep flowering through summer but you do need to dead head regularly for this to happen or they start to set seed and no longer make flower buds.
Clematis cuttings are tricky but you can try them from mid spring to mid summer taking double leaf cuttings with half the length of stem between them and teh next set of leaves and burying them up to the leaf nodes in a pot of suitable compost. layering is probably easier. Just take a stem and peg a leaf node to the ground or in a pot of moist compost and wait for it to root.