Hydrangea pruning

As a complete novice last year I cut my hydrangea right back to the ground in autumn (having been told it flowers on new growth) after having put it in the ground in the spring. Having now read up on care I apparently did totally the wrong thing...……..however this year it has re grown into a perfect large beach ball shape albeit with smaller blooms but enough of them. Ive been using hydrangea colourant to get it blue and it is indeed a gorgeous shade. What would people recommend I do this year keeping in mind I want to control the size.

 

It depends on the variety Cindy Some will flower on wood made this year, others on wood made last year.
However, I suggest you don’t prune it down to the ground this time. In spring remove the flower heads.
To keep it reasonably compact you can cut out one or two of the oldest wood but not for a few years yet.