Why Are My Leaves Yellow?
While you expect leaves to change colors in the fall, a tree with yellow leaves in the summer may indicate a health problem known as chlorosis. Trees most commonly impacted by chlorosis include white oak, red maple, pin oak, river birch and white pine. Chlorosis does affect the overall health of your tree, and is considered an abiotic tree disorder, as it is caused by a non-living thing. Have your tree evaluated if you are seeing yellow leaves.
What is chlorosis?
The visible sign of yellow leaves is the result of limited chlorophyll formation. Deficiencies of minerals–iron (most common), zinc, magnesium, and/or copper are the cause of chlorosis. Although the soil may not be lacking in these minerals, there are several factors that contribute chlorosis:
- Very wet weather
- Poor drainage
- Heavy, compacted soil
- Alkaline soil, making it more difficult for your tree to absorb certain minerals