1. Base Fertilization (Autumn – Winter)
Period: October – December
Fertilizer Type: Granular NPK (e.g. 15-15-15 or 20-10-10) with sulfur and potassium
Dosage: 40–60 kg/acre
Purpose: Replenish nutrients after harvest and prepare the tree for new growth.
2. Nitrogen Fertilization (Early Spring)
Period: February – March
Fertilizer Type: Urea or ammonium nitrogen form (stabilized preferred)
Dosage: 15–20 kg/acre
Purpose: Support new vegetative growth and flowering.
3. Fertilization During Fruit Set
Period: April – May
Fertilizer Type: Nitrate nitrogen with potassium (e.g. potassium sulfate)
Dosage: 10–15 kg/acre
Purpose: Enhance fruit size and quality.
4. Final Fertilization (Summer)
Period: June – July
Fertilizer Type: High potassium (e.g. 0-0-50)
Dosage: 10–15 kg/acre
Purpose: Improve stress tolerance and oil quality.
Supplementary Foliar Nutrition
- Water-soluble NPK fertilizers (e.g. 20-20-20)
- Micronutrients (Boron, Zinc, Iron)
- Application of foliar sprays at critical growth stages
Tips:
- Potassium is critical for oil quality and drought tolerance.
- Boron (B) helps with fruit set and fruit development.
- Regular soil and leaf analysis optimizes the fertilization program.
- Avoid excessive nitrogen use, especially close to harvest.