QuestionsHow to growTrees and ShrubsPests and Diseasesrhodendron 0 Vote Up Vote Down Jackie Duffy asked 16 years ago I have a rhododendron, its in its 3rd year, this year all the leaves went brown and fell off, the stem of it is still green, what can I do to stop it dying. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago This sounds like a root rot disease has taken hold and there is little likelihood of recovery. Leave it for a few weeks and see. Do not feed or prune.