Clematis Piilu

I dont think there's a Clematis I don't like lol

Beautiful show of flowers. Thank you.
How / when do you prune this one?

I'm no expert, but I pruned this at the end of February and it's almost 3ft tall now, and very bushy. Unlike a lot of clematis this one flowers very low down on the bush so I cut it down to a new bud about a foot from the ground.
I believe this one is also known as "Little Duckling"

Thank you, it's gorgeous