How to prune this hydrangea?
I moved in to this house in summer 2013, with a hydrangea in the back garden.
In that winter, I gave it a sort-of prune (didn't really know how). In spring/summer 2014, it came out alright, but maybe blooming less. This winter, I have not nipped it back at all.
Now I want to know - what's the right way to tackle this now for the sprint and summer ahead? (Assuming it isn't too late to have any effect).
Should I be reducing it in size? Picking off some branches but not others? How do I know which?