I have this clematis around my front door and have found it a bit unpredictable over
the years. When I first planted it I thought for a while it wasn't going to make it
because it was very weak and spindly. However, we had a few flowers the first year -
then to my dismay it didn't show any sign of life at all the following spring. I gave it
up for dead and popped a planter full of pansies there instead. A few weeks later
I was amazed to see the clematis was alive after all and was going great guns.
It's now so rampant I'm going to have to seriously cut it back. I think the problem
was it needed it's face in the sun and it's feet in the shade. You probably know
this already but I thought I'd mention it anyway. I hope you manage to save it!