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Purple Corn In Warm Soils
Purple corn has long been associated with phosphorus deficiency. Normally, purple corn is common when temperatures are low. However, corn in very warm soils can have purple leaves. Any condition which restricts root growth may cause purpling in corn leaves. Some varieties are more sensitive than others. Purple corn often is associated with poor soil conditions caused by working soil too wet. If purple corn is seen, dig up some plants carefully and look at the soil structure. The soil will be very hard in the rooting zone. Roots may tend to grow sideways in an attempt to reach softer soil and water. Applying sidedress N or cultivation immediately will help break up the soil and allow plant roots to penetrate. When cultivating following sidedress, wait about 3-4 days before cultivation. Apply N about 6 inches deep when sidedressing.
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