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Iron deficiency on apple is rare in Kentucky. Symptoms show up first on the youngest leaves, which turn yellow. Initially the fine leaf veins are dark green, but as the deficiency progresses the entire leaf turns uniformly yellow. This deficiency occurs when the soil pH is too high and iron is chemically bound in the soil so it is unavailable to the tree.

Iron deficiency (Strang, UKY)
Iron deficiency.

(Photo: John Strang, University of Kentucky)

     

Management:

  • Applications of iron chelate to foliage and/or soil provide a temporary solution
  • Lower soil pH for long-term control

   

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