Posted: 16/07/2013 at 18:50
Prune after it has finished flowering and as has already been mentioned, don't cut too far back. You could part of the plant quite hard back - a bit that is paticularly in the way,overhanging etc but always make sure there is some growth beyond where you are cutting and see how the plant responds. Cistus often get woody and leggy with age and are often best replaced. They are quite easy to take cuttings from and they would be your insurance....if the plant didn't like the hair cut!