Chilli is an important vegetable and spice crop grown widely across India. For farmers, achieving good yield, strong plants, and high-quality fruits depends greatly on proper nutrient management. Chillies are nutrient-demanding, and without the right fertilizer dose, the plants may show problems like yellow leaves, dropping flowers, poor fruit setting, or small fruit size. Understanding the recommended fertilizer dose helps farmers ensure healthy growth and better production.
Before applying fertilizers, it is important to prepare the soil properly. Chillies grow best in well-drained, loamy soil rich in organic matter. Adding well-decomposed farmyard manure (FYM) or compost at the time of land preparation improves soil structure and supports strong root development. Farmers generally apply 10–15 tonnes of FYM per acre (or 25–30 tonnes per hectare) before transplanting.
For chemical fertilizers, the recommended nutrient dose for chillies is usually around 100–120 kg Nitrogen (N), 50–60 kg Phosphorus (P₂O₅), and 50–60 kg Potassium (K₂O) per acre. These values can vary slightly depending on soil type, variety, and local conditions, but this range works well for most regions.
Phosphorus and potassium should be applied basally, meaning at the time of transplanting. Phosphorus supports root growth and early establishment, while potassium strengthens the plant and improves fruit quality, disease resistance, and stress tolerance. Farmers can use fertilizers like SSP (Single Super Phosphate) for phosphorus and MOP (Muriate of Potash) for potassium.
Nitrogen, on the other hand, should not be applied all at once. Instead, it should be given in 2–3 split doses because nitrogen moves easily in the soil and can be lost if applied in large amounts. Too much nitrogen at one time leads to lush leafy growth but poor flowering and fruiting. The best split schedule is:
1/3 nitrogen at transplanting
1/3 at 30 days after transplanting (vegetative growth stage)
1/3 at flowering or early fruit formation stage
This ensures steady growth and good fruit development.
Micronutrients also play an important role in chilli production. Deficiencies of zinc, boron, magnesium, or calcium can cause leaf curling, blossom drop, and poor fruit quality. Foliar sprays of micronutrient mixtures or individual nutrients help strengthen the plant. For example, spraying calcium nitrate during fruit formation improves fruit firmness and reduces cracking.
Organic options like vermicompost, seaweed extract, and biofertilizers (Azospirillum, Azotobacter, and phosphate-solubilizing bacteria) can also be used. These improve soil health, increase nutrient availability, and support long-term productivity.
Irrigation must be managed carefully along with fertilization. Applying fertilizers when the soil is too dry or waterlogged reduces nutrient uptake. Light irrigation after fertilizer application helps nutrients reach the root zone effectively.
In simple words, chillies require around 100–120 kg nitrogen, 50–60 kg phosphorus, and 50–60 kg potassium per acre, along with FYM, split nitrogen applications, and micronutrient sprays. By following the recommended fertilizer schedule and maintaining soil health, farmers can achieve strong plants, more flowers, better fruit setting, and higher yield in their chilli crop.
