Best Fertilizer for Citrus (Orange and Kinnow) in India
Citrus crops such as sweet orange, Nagpur orange and Kinnow mandarin are heavy nutrient users whose needs rise sharply with tree age. Young trees need mostly nitrogen and phosphorus to build
Overview
Citrus crops such as sweet orange, Nagpur orange and Kinnow mandarin are heavy nutrient users whose needs rise sharply with tree age. Young trees need mostly nitrogen and phosphorus to build a strong frame, while bearing trees need a balanced dose with good potash for fruit size, juice and quality. Citrus is especially prone to zinc, iron and boron deficiency, so micronutrient sprays are almost always part of the package. Nutrition is timed to the main growth flushes and the chosen flowering season. ICAR-CCRI and State Agricultural Universities recommend doses per tree per year linked to age, applied in two or three splits. The figures below are a per tree per year range by age. Always adjust them to your Soil Health Card or a fresh soil test, your crop such as Kinnow or Nagpur santra, and local KVK advice.
Recommended NPK dose for Citrus (Orange and Kinnow)
Doses rise with age. A full bearing tree of about 8 years and older commonly needs roughly 500 to 1000 g N, 250 to 500 g P2O5 and 250 to 500 g K2O per tree per year with 25 to 50 kg FYM. A useful pattern is around 600 to 800 g N, 300 to 400 g P2O5 and 300 to 400 g K2O for a mature Kinnow or orange tree. Young trees in the early years get roughly one quarter to one half of this, increasing each year. Treat these as a starting range and confirm with your Soil Health Card, a fresh soil test and KVK advice.
Application schedule
Apply the full FYM and phosphorus along with part of the nitrogen and potash just before the main spring flush in February, then give the remaining nitrogen and potash in one or two splits during the monsoon, ending well before fruit maturity. For Kinnow in north India, the main dose goes in around February, with split nitrogen through the season. Spread fertilizer under the canopy edge where feeder roots are active, fork it in lightly and irrigate. Add micronutrient foliar sprays at the new flush stages to prevent the common zinc, iron and boron deficiencies.
Organic & bio-fertilizers
Apply 10 to 15 kg of well rotted farmyard manure per young tree and 25 to 50 kg per mature bearing tree each year. Vermicompost at 5 to 10 kg per tree and oil cakes such as neem cake improve soil and supply slow nutrients. Biofertilizers such as Azotobacter, Azospirillum, phosphate solubilising bacteria and mycorrhiza help root growth and nutrient uptake, which is valuable because citrus roots are sensitive. Mulching the basin conserves moisture and slowly builds organic matter, helping the tree withstand stress and improving fruit quality.
Micronutrients & deficiency signs
Zinc, iron and boron deficiencies are very common and widespread in Indian citrus orchards. Zinc deficiency shows as yellow mottling between green veins on small, narrow upright leaves. Iron deficiency yellows young leaves with a fine green vein network, often on calcareous soils. Manganese deficiency looks similar but milder. Boron deficiency causes lumpy, hard fruit and gum pockets. Correct with a tank mix foliar spray such as 0.5 percent zinc sulphate, 0.5 percent ferrous sulphate, 0.5 percent manganese sulphate and 0.1 percent borax at the new flush. Confirm the need with leaf analysis or KVK advice.
Tips & cautions
Always plan for micronutrients, since zinc, iron and boron deficiencies are almost guaranteed in Indian citrus. Spray a tank mix at the new flush stages rather than waiting for symptoms. Time the main dose before the spring flush and split nitrogen so the tree is fed through fruit set and growth. Apply fertilizer under the canopy edge, not against the trunk. Avoid waterlogging, which harms citrus roots and worsens iron chlorosis. Keep potash adequate for juice and fruit size, and do not over apply nitrogen, which delays colour and lowers quality.
These are general recommendations. For the exact dose, follow your Soil Health Card / soil test and local KVK, and avoid over-applying urea.
FAQs
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