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Fruit tree leaves are turning yellow

Updated February 21, 2017

Fruit trees grown in orchards and home gardens are as susceptible to disorders as other plants in the landscape. Yellow foliage on a fruit tree is commonly caused by nutritional deficiencies.

Cause

Deficiency of iron, manganese and magnesium in fruit trees causes foliage to turn yellow. Sometimes the fertilisers used in trees also contain herbicides that cause foliage to yellow and thicken. Nutrient deficiencies are common in trees growing in overly alkaline or poorly drained soil.

Symptoms

Iron deficiency causes foliage to lose colour, turning yellow with only a network of green veins. Leaf edges often start to die. Manganese deficiency commonly affects only the older foliage; young foliage is affected in more severe cases. A deficiency of magnesium is frequently seen on apple trees during late summer. Foliage yellows and drops prematurely.

Management

Use fertilisers that contain chelated iron to address iron deficiency in trees. You can also apply sulphur to the ground outside the tree drip line. Often the tree is unable to access the nutrients in the soil; the addition of sulphur raises the acidity of the soil and makes nutrients easily accessible to the tree.

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About the Author

Irum Sarfaraz is a freelance writer with over 20 years of nonfiction writing experience in newspaper op-eds and magazine writing, book editing, translating and research writing. Sarfaraz is originally from Pakistan and has been published in both American and Pakistani newspapers and magazines. She holds a Bachelor of Arts in English literature, and diplomas in nonfiction writing.