Master Gardener Decision Support Guide
Woody Ornamentals
Rhododendron
The disease you have described is rhododendron leaf and shoot
gall. It doesn't hurt the overall health or growth of the plant.
Once you see the problem it is too late to protect the plants
this year. The actions you take this year will not reduce future
infections. The disease is variable and may not show up next year
even if no action is taken. In nurseries or high value
landscapes, ferbam sprayed in the spring when leaves first start
to unroll, and again in 10 days will help prevent this disease.
For more information see
Note on Rhododendron Diseases
Return to
Rhododendron,
Woody Ornamentals,
Master Gardener Decision Support Guide
Designed by David
Goforth on December 17, 1997.
Contents modified on February 18, 1998.
Contents checked on February 18, 1998.