Purpling of Maize Leaves

Any maize leaf turning purple needs to be analyzed, in case of nutrient deficiencies. Care needs to be taken however, as some varieties have a natural purple pigmentation and low temperatures can disturb the plant’s metabolism, leading to similar symptoms. If in any doubt, test leaf tissues to ensure a correct diagnosis for nutrient deficiencies.

IMAGE phosphorus purple
Phosphorus deficiency
IMAGE maize magnesium
Magnesium deficiency

Phosphorus

A dark green colour on the leaves and stem, with purplish edges, probably due to anthocyanin accumulation, indicates a phosphorus deficiency. Symptoms are worst when soils are wet and cold.

Magnesium and Potassium

At later stages of magnesium (first yellow, then white) deficiencies, leaves may become reddish-purple and in severe cases leaf tips and edges may die. Purple maize leaves can also occur as a result of an imbalance with potassium.

Recommended Yara Fertilizers for Maize

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YaraBela CAN

27% N - Granular calcium ammonium nitrate based nitrogen fertilizer for use on any crop.

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YaraBela AXAN

27% N + 3.6% S - Uniform compound granular nitrogen and sulphur fertilizer for use on all crops.

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YaraVita MAIZE BOOST

A liquid micronutrient fertilizer containing a high concentrations of phosphate together with zinc, magnesium and potash for foliar application to maize and other crops.

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YaraVita FOLIAR POTASH

A liquid foliar fertilizer containing 500 g/l potash for foliar application to provide additional potassium or correct potash deficiencies in a wide range of crops.

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YaraVita BORTRAC 150

A liquid micronutrient fertilizer containing 150 g/l boron for foliar application to provide additional boron or to treat boron deficiencies in a wide range of crops.

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YaraVita ZINTRAC 700

A fully formulated flowable liquid micronutrient fertilizer containing 700 g/l zinc for foliar application to prevent and treat zinc deficiency on a wide range of crops.

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YaraVita THIOTRAC 300

A fully formulated liquid fertilizer solution containing 300 g/l sulphur for foliar application to prevent and treat sulphur deficiencies on a wide range of crops.