Iron Chlorosis of Trees and Shrubs

Document Type

Article

Publisher

University of Nebraska

Publication Date

1-1-1989

Abstract

Many trees, shrubs, and other ornamental plantings in Indiana and throughout the Midwest suffer from iron deficiency caused by high pH (alkaline) soil (Fig. 1). Soil pH affects plant growth directly and indirectly by affecting availability of essential nutrients and microbial activity. One of these nutrients is iron, an essential plant nutrient that is required for the production of chlorophyll. Chlorophyll is necessary for photosynthesis and gives plants their green color. Iron (and manganese) deficiency results in leaf yellowing (chlorosis); over time, scorching of foliage, dieback and even death of the tree or shrub can result.

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