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Potassium is an essential nutrient for a plant's flower and fruit formation and to increase the general hardiness of the plant.

Symptoms of deficiency[edit]

Main article: Potassium deficiency

Poor quality fruits and seeds Leaf scorch on older leaves Leaves bronzed and rolled inwards and downwards[1]


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Mineral nutrients
Primary macronutrients Nitrogen · Phosphorus · Potassium
Secondary macronutrients Calcium · Magnesium · Sulphur
Micronutrients Boron · Chloride · Copper · Iron · Manganese · Molybdenum · Zinc