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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. 

Nitrogen excess signs include reduced fruit color break from green to orange/red, an increase in peel thickness and there is an increase in 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

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

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).