Practices that increase levels of soil organic matter, such as adding manure to soil, can help maintain iron in a plant-available state. Natural chelates can be found in soil organic matter. The chelated iron discussed above is man-made. Frequency will depend on soil and plant properties, and is best gauged by observing plant performance. Treatment may have to be repeated approximately monthly during the growing season. Chelated iron fertilizers, in which the iron is combined with a chemical called a chelate that helps keep the iron in a plant available form, are most appropriate for application to the soil. There are several methods for correcting iron deficiency once it is identified. Members of the Ericaceae or Heath family such as azaleas, rhododendrons, and blueberries are extremely susceptible to iron deficiency. Examples include citrus, rose, gardenia, crepe myrtle, and many others. Most humid tropical and subtropical regions fall into this category and therefore many of the ornamental and crop plants we have imported from these areas are susceptible to iron deficiency. Plants from regions with acidic soils do not have this ability. Desert plants are less susceptible to iron deficiency because they have mechanisms that enable them to solubilize and absorb iron from high pH soils. Susceptibility to iron deficiency varies greatly between plants. Note that it may be difficult to distinguish iron deficiency symptoms from those of other nutrients, particularly zinc, on some plants. No noticeable physical deformity occurs, but in severe cases the youngest leaves may be entirely white and stunted. The area between the leaf veins becomes pale yellow or white (this is called interveinal chlorosis). The symptoms of iron deficiency appear on the youngest, newest leaves. This condition may be recognized by the nature of deficiency symptoms. If an adequate amount of iron is not available to plants, iron deficiency (iron chlorosis) will result. Trees & shrubs: For root feeding, use 4 oz per inch of trunk diameter diluted with 5 to 10 gals of water.Turf: Dilute 5-10 gals with sufficient water to cover 1 acre, or 8 oz with sufficient water to cover 1000 square ft.Compatible with tanks mixes of most fertilizers, insecticides, fungicides and penetrating aids.Remains in the soil for extended feeding.Provides iron in a form that is immediately available to vegetation.Reverses or reduces the pale green or yellow discoloration associated with chlorosis.This versatile concentrate is easily absorbed and can be applied or injected into the soil, or sprayed directly onto foliage. So, if you have used an EDTA-containing chelated iron product on your lawn, please keep. This nourishing liquid mineral supplement provides a form of iron required to prevent or cure iron chlorosis in turf, ornamental shrubs and trees. Liquid iron products that contain EDTA are toxic for pets and people.
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