I've taken over this garden recently but according to my gardening book, I missed the pruning season last year. It says you should prune them after flowering so it is coming up.
My proven is that I really dislike the globe shape it's in. I'd like to open it out so it looks a bit more natural but as it's a really healthy plant I don't want to damage it. I really have no experience either.
It's the bright pink one by the way. The globe shaped purplish thing in front of it is an Acer which has suddenly plumped out.
Tips would be gratefully received.