Yellow Leaves on Rhododendron

This time of year some broadleaf evergreens can begin to show some yellowing. This is sometimes normal but in certain cases may indicate a problem. There are a number of reasons yellowing can happen. Have you noticed these symptoms on your rhododendrons?

Senescence - Common ornamental rhodies are evergreen however after 2-3 years, old leaves naturally yellow and drop off. This is nothing to worry about.

Soil Compaction - A rhododendron planted in a soil bed with poor drainage, or buried too deep, will have an excessive amount of stress causing yellowing, dropping leaves.

pH Balance - Rhodies are picky about their soil and prefer acidic conditions over alkaline. Otherwise, they experience a mineral deficiency which causes chlorosis (color loss in leaves).

Pests - Some rhododendron are susceptible to insect feeding damage such as scale and lacebug, especially if they’re already suffering from soil issues. This leaf damage looks more like yellow stippling or “fuzzy” bark but can cause some leaves to die and drop off.

Now is a great time to fertilize stressed shrubs with our organic compost tea! If your rhododendrons show excessive yellowing, a soil health boost can help them endure the coming winter better. Contact us today for a free inspection.