QuestionsHow to growTrees and ShrubsPruningrhododendron 0 Vote Up Vote Down lilian o brien asked 13 years ago My neighbour who is 89 years has a beautifull rhododendron tree in her garden some branches have broken off a bit they still bloomed. When is the right time to cut them off? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Damaged branches can be taken off at any time, but ideally just after flowering.