Hi, I have about 20 large bottle brush trees forming a high hedge both sides of our large house. Over the last 6-12 months branches have been dying back , with the leaves going brown first and then dying. I have been cutting dead branchs off but more seem to be dying. I have tried a few things ie more water, less water and native fertiliser but no change. I live in Longreach western Qld, hot dry climate. The trees are about 15 years old. Any advice on this problem would be greatly appreciated. Thanks Brian
Your trees could potentially have a borer or a root rot disease. But, more likely, the problems are caused by environmental conditions. Check whether anything has changed recently in the trees' environment. They may also need fertilizer- bottle brush trees tend to develop iron deficiency.