I wonder if I could ask for some advice please. Some 2 months ago I took 4 clematis cuttings (President), put them in pots and covered them with a plastic bag each. Three took well and in a short time I had new leaves growing at the nodes. After 3-4 weeks I removed the plastic bags. In an hour or two the healthy young leaves looked wilted so I replaced the bags and they revived. Last night - some eight weeks after I originally took the cuttings - even though I couldn't see any new roots at the bottom of the pots, the leaves looked robust enough, so I took the bags off. By this morning the new leaves looked in a bad way, and though I put them back in bags I don't think they'll survive. What am I doing wrong here? They should be OK to survive without the bags after 4 weeks. I'd be very grateful for any advice. Thank you.