If you notice the color of your trees’ leaves fading to a pale green or yellow hue, they may be suffering from Chlorosis. Often caused by iron and manganese deficiencies, the disease will cause slow growth, leaf loss, and eventually tree death if allowed to progress. Iowa trees most affected by Chlorosis include Maple, Pin Oak and River Birch. Whether the soil has available iron and manganese or not, much of the soil in our area has too high of a ph level for these species of trees to make use of these nutrients. Therefore, Chlorosis is an abiotic condition caused by several factors including poor root zone development, lack of available nutrients and highly alkalidic soil.
We do have treatments for Chlorosis. For severe cases, we offer a multi-tiered response of nutrient injections, ph reducer and growth regulator. If we catch it sooner than later, simple soil injections of fertilizer with iron, manganese and ph reducer can be very effective to prevent Chlorotic symptoms from persisting in the long term