Citrus plants such as lemon, orange, and sweet lime are widely grown in India and are important commercial fruit crops. For citrus orchards to remain healthy and productive, balanced and timely fertilizer application is essential. Citrus trees grow throughout the year and continuously absorb nutrients from the soil. Therefore, understanding the correct annual fertilizer dose helps farmers maintain strong tree growth, better fruiting, and improved fruit quality.
The fertilizer requirement of citrus plants depends largely on the age of the tree. Young trees need nutrients mainly for vegetative growth, while mature trees require more nutrients for flowering and fruit development.
For young citrus trees (1–3 years old), farmers should apply around:
10–15 kg of well-decomposed farmyard manure (FYM) per year
200–300 g nitrogen (N)
100–150 g phosphorus (P₂O₅)
100–150 g potassium (K₂O)
These nutrients help in developing a strong root system, healthy branches, and proper canopy formation. The fertilizers should be applied in a circular band around the tree, keeping some distance from the trunk.
For medium-aged citrus plants (4–7 years old), the annual fertilizer dose increases as the tree expands:
20–30 kg FYM
400–600 g nitrogen
200–300 g phosphorus
200–300 g potassium
At this stage, trees start producing more flowers, so nutrients help support both vegetative growth and early fruiting. Splitting nitrogen into two or three doses improves nutrient uptake and reduces wastage.
For mature fruit-bearing citrus trees (8 years and above), the nutrient demand is highest. Farmers should apply annually:
40–50 kg FYM
800–1,000 g nitrogen
400–600 g phosphorus
400–600 g potassium
These amounts support heavy flowering, fruit setting, and fruit development. Organic manure improves soil structure, while NPK fertilizers supply essential nutrients for productivity.
An important point is timing. Citrus plants respond best when nutrients are applied in split doses during key growth periods:
February–March (after winter)
Supports new leaf flush and early growth.
June–July (monsoon season)
Improves vegetative growth and helps the plant recover from summer stress.
September–October (fruit development stage)
Enhances fruit size, colour, and juice content.
Micronutrients also play a crucial role in citrus health. Deficiencies of zinc, iron, magnesium, and boron are common and lead to yellow leaves, poor fruiting, and reduced fruit quality. Foliar sprays of micronutrient mixtures or soil application can correct these deficiencies.
Citrus trees also benefit from mulching with dry leaves or organic matter, which helps conserve soil moisture and improves nutrient availability. Proper irrigation, especially during dry months, ensures that the fertilizers are absorbed effectively.
Regular monitoring of tree health and soil testing helps farmers adjust fertilizer doses as needed. Too much fertilizer can harm the tree, while too little results in poor yields.
By applying the recommended annual fertilizer doses based on the tree’s age, using split applications, adding micronutrients, and maintaining good orchard management, farmers can ensure healthy citrus trees with consistent yields and high-quality fruits throughout the year.
