Asked September 27, 2020, 5:43 PM EDT

The leaves of my rhododendron, 40 years old, are turning yellow and dropping. What is the problem and what can I do to keep it healthy and producing flowers in the spring?

Baltimore County Maryland

1 Response

Rhododendron may normally drop some old leaves as fall progresses. If it is dropping new leaves (from this year or last), then it may be a problem.

If there has been a change in its site, that could be the cause.

Keep an eye on it. Here is a diagnostic chart that may be helpful: https://extension.umd.edu/hgic/topics/diagnostic-chart-azalea-and-rhododendron-problems
For details about each problem, use the link to disease problems at the bottom of the page.

If you see any new symptoms, let us know and/or send photos.