Although they only need a small amount of it, iron helps give plants oxygen to keep them thriving and to keep their healthy green color. When a plant lacks oxygen, its green color fades and its health quickly declines, causing an iron deficiency in the plant.
Chlorosis is a condition where plant leaves begin to turn yellow, white-yellow, or pale, indicating a lack of chlorophyll (the green pigment found in plants responsible for photosynthesis). Chlorosis is caused by iron being “bound up” and unable to access the plant roots. A few causes of chlorosis include:
Overwatering: Soil that is overly wet or dry predisposes plants to chlorosis.
Compacted Soil: Conditions that limit soil air-filtration, such as compaction, limit the effective rooting area and soil oxygen levels which typically lead to chlorosis.
Planting too deep: Planting tree too deep can result in trunk-girdling roots, which is an early symptom of chlorosis.
Excessive organic matter in the soil: While the organic matter is typically the key for healthy plants, too much can aggravate iron problems.
Extreme salt levels: High salt levels affect the water and nutrient uptake of plants.
Plants affected by chlorosis, have a little chance of survival since they have little to no ability to produce carbohydrates through photosynthesis. Affected plants, however, do have a chance of survival if treated sufficiently.
Iron chelates (Granular)
Treating or controlling chlorosis is not a simple task and can be quite expensive, so preventing it is a much better treatment. A few ways you can prevent chlorosis include…