Iron is essential for plants to flourish, performing a vital role in producing chlorophyll, a green pigment involved in the absorption of light required for plant growth. An iron deficiency causes in a reduction in chlorophyll. This shortfall results in a yellowing of the plant leaves, an early sign of iron chlorosis. If not corrected, this iron imbalance will result in the death of the tree or plant. If the veins in the leaves are darker than the rest of the leaf, the soil is iron-deficient. A soil analysis by your local extension office or garden center can determine the degree of iron deficiency. Several methods may be used to provide iron to affected plants.
Instructions
1. Sprinkle bone meal on the soil. It's a great item to till into garden soil to increase iron content. Follow directions on the package and till to a depth of 12 inches.
2. Lower the pH of the soil by adding chealated iron or iron sulfate. Several formulations are available at most garden centers or landscape companies. Work the product into the soil around the base of the tree or plant.
3. Work iron into the soil. For smaller trees, add iron supplement directly to the soil under the tree canopy. A commercial product such as Ironite may be used. Follow the directions on the package carefully.
4. Spray plants and trees with a commercial iron formula. Follow package directions carefully. The best method to correct yellowing of existing plants is to use either chelated iron or iron sulfate as both a soil treatment and as a foliar spray.
5. Call a professional. On large trees with deep roots, it may be more feasible to hire an arborist to inject iron directly into the tree trunk. The benefits of this injection practice is that trees respond quickly. One application lasts three to five years.
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