encouraged by all the top growth, i dug out carefully the woody cutting & one new growth cutting, all are growing up top but there are no obvious trailing roots, i went and got my husbands strong glasses and i can see what look like roots just emerging, the cutting are pretty long approx. 8/9 inches long so i will give a few weeks longer and see what happens, i will have another go with internodal and hopefully by the time it takes to wait for flowers to finish, i will have cleared the space to put the heat mat back out again
Good luck, but I don't think that the long hardwood cuttings will make root, very deceiving when there is active top growth, best at this stage to try tip cuttings, using the new tips from the long hardwood pieces, cut them about 1 inch long, cut above a node.
Worth a try, I have rooted some clematis Carol Leeds from tip cuttings, taken early April, from hardwood cuttings I took in January. This is a particularly difficult clematis to root normally but it has worked using this method.
The clematis clan is massive, over 300 species, thousands of different hybrids and cultivars, 3 pruning groups, lots of different flowering periods, many different cultural requirements.
I grow about 500 varieties, mainly the Summer flowering, group 3.
I use new cutting material from plants that have been pruned hard back over Winter, they are in glasshouses so probably about 5 to 6 weeks ahead of garden grown plants. Cuttings from greenhouse grown material can be taken rom February onwards.
Atragenes and montanas best to take cuttings after they have finished flowering and sending out new shoots. June, July, August.
I use Doff hormone rooting powder.
I have gone full circle with the rooting medium, using coir, perlite, vermiculite, grit, sand, John Innes Seed & Cutting and eventually ending up with a peat based compost.
I have heated cables under my propagation area, temperature set at around +18C.
I don't have misting facilities, just a hose with fine rose attachment.
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encouraged by all the top growth, i dug out carefully the woody cutting & one new growth cutting, all are growing up top but there are no obvious trailing roots, i went and got my husbands strong glasses
and i can see what look like roots just emerging, the cutting are pretty long approx. 8/9 inches long so i will give a few weeks longer and see what happens, i will have another go with internodal and hopefully by the time it takes to wait for flowers to finish, i will have cleared the space to put the heat mat back out again 
Good luck, but I don't think that the long hardwood cuttings will make root, very deceiving when there is active top growth, best at this stage to try tip cuttings, using the new tips from the long hardwood pieces, cut them about 1 inch long, cut above a node.
Worth a try, I have rooted some clematis Carol Leeds from tip cuttings, taken early April, from hardwood cuttings I took in January. This is a particularly difficult clematis to root normally but it has worked using this method.
Thanks!