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Citrus Nutrition

Fertilizer & Nutrition Video

Fertilizer Table

Nitrogen

Nitrogen stimulates overall growth of a citrus tree. It is very important for flowering and fruit set.

  • Nitrogen deficiency will cause the entire leaf becomes light green to yellow in color. The leaves drop premature - normally, a citrus leaf is to last 18 to 24 months, and the plants show stunted growth.
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Nitrogen excess signs include reduced fruit color break from green to orange/red, an increase peel thickness and there is an increase fruit acidity which can be considered negative.

Phosphorus

Phosphorus is crucial because absorption from the soil is slow, making a toxicity unlikely. However, too much phosphorus can cause poor uptake of other nutrients.

 

Phosphorus promotes root growth, promotes winter hardiness, and it speeds up fruit maturity

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  • In a phosphorus deficiency, your citrus tree will show: reduced flowering, small size fruit, with a course fruit with a thick rind, and reduced juice content. The leaves may turn a bronze color , older leaves brown at the margins and tip and branches weaken. When phosphorus deficiency is severe, plants show stunted growth. and the fruit is misshapen and spongy before maturity
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Potassium

Plant cells contains high concentrations of potassium. The level of potassium is most high in nuts and fruits. The word potassium is derived from the “pot-ash” (plant ashes soaked in water in a pot) – the primary form of this mineral as plant food before the industrial era.

A good balance of potassium helps enhance fruit quality: including formation, size, flavor and color.

 

In potassium deficiency, leaves have yellow to bronze blotches and the tree has stunted growth with severe deficiency. Fruit will suffer, exhibiting: splitting, granulation, yield reduction, spongy fruit (puffing), and plugging (peel removed in stem-end area).