Clematis: First clematis, ID please :-), 0 by 3gardeners

3gardeners wrote:
Hey. This is my first clematis. I bought it for my husband a couple of years ago, before I was into labeling things. It's bloomed before, but not this big! This lavender bloom is about 7.5 inches wide, tip to tip. Will someone please ID it for me?

It blooms in the early spring (now) and stops blooming in about a month or so I guess. How and when can I trim this? Does it bloom on new or old wood?

Thanks for your help!