Micro Nutrients
Multi Nutrients
Copper (Cu), Manganese (Mn), Iron (Fe), Boron (B)
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Iron Chlorosis
The newest leaves turn yellow while the veins stay sharply green, giving a net-like pattern. Older leaves further down stay normal. It is a lime-induced problem: the soil usually has plenty of iron, but high pH and calcium carbonate lock it up.
How to scout
Confirm by which leaves are affected — newest first with green veins is iron. Nitrogen shortage does the opposite and starts with the oldest leaves.
Action threshold: Adding iron to a limey soil mostly wastes it. Use a chelated iron spray on the foliage, improve drainage, and stop over-irrigating.
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