Posted: 12/08/2015 at 16:12
Agree but I prune also as the summer progresses, viz., I Cut off flowered stems back to shoots further back. Its surprising how this reduces the bush during the growing season. I have a tall variety.....prob about 12 to 15' from being cut back hard in early spring/late autumn. I can easily reduce that height by 3' of more as summer passes this way.
A bonus is that it will flower for longer.
June, cutting back to 2' is fine if the stems aren't too thick or the bush too old. You don't say how old your bush is.