Identifying Clematis?

I moved into a home about 3 1/2 years ago. It has a tall (6+) foot vine which I'm told by neighbours is a clematis. It has not flowered or even put on many leaves since we have lived here so I'm not sure how to identify it so I can prune and care for it properly. The only thing I can say is that it has small dark green almost oval shaped leaves. I did try and trim off a lot of the dead wood last year and put a couple of hostas around the root to help "cool the feet". I put some shake fertilizer on it before the snow and a bit more a few days ago. It is just starting out but is putting on more leaves this year and appears to have leaves and or buds on old and new growth.