Posted: 14/05/2017 at 11:41
That looks to me like frost damage, or certainly cold winds. Give them a tonic of liquid tomato feed and be patient. Most clematis are hardy but soft new spring leaves and shoots will be frost tender. They are also gross feeders so give them a generous dollop of slow release clematis feed every spring and occasional tonics of liquid tomato food up until late June.
Make sure you plant your new clem about 4" deeper than it was in its pot. Give it a good soak first and backfill the hole with good compost mixed into the soil and water well.
Trachelosepermum doesn't like frost at all. Give that plant a feed too and then, when the shoot is long enough, lift it up to the wires and tie it in but I would advise stretching those wires much more tautly.
Last edited: 14 May 2017 11:42:02