Fertilizing young mango trees: Fertilizing young mango trees primarily with nitrogen and phosphorus fertilizers, with potassium fertilizers added as appropriate.

Fertilizing fruiting mango trees: Fertilizing fruiting mango trees primarily with nitrogen and potassium fertilizers, with potassium usage no less than nitrogen, supplemented with phosphorus, calcium, and magnesium fertilizers. Fruiting mango trees require fertilization four times a year.
Flowering fertilizer: Flowering fertilizer for mangoes is generally applied within the tree canopy. Apply 150 grams of urea and 150 grams of potassium sulfate per plant. Increase the amount of fertilizer as the tree grows stronger.

Flowering fertilizer: Flowering fertilizer for mangoes is generally applied from the last blooming stage to the flower falling stage. Apply 0.1-0.2 kg of urea and 0.2-0.3 kg of a nitrogen, phosphorus, and potassium compound fertilizer (15-15-15) per plant. Simultaneously, apply 0.2% urea, 0.2%-0.3% borax, and 0.2%-0.3% potassium dihydrogen phosphate to the leaves. Fruit-boosting fertilizer: Mangoes should generally be fertilized 30-40 days after flowering. Apply 0.3-0.5 kg (15-15-15) NPK compound fertilizer, 0.5 kg (15-15-15) potash fertilizer, and 0.2-0.5 kg (15-15-15) cake fertilizer per plant. Simultaneously, apply 0.2%-0.3% potassium dihydrogen phosphate (KDP) or other foliar fertilizers two to three times.

Post-fruiting fertilizer: Mangoes should be fertilized immediately after harvest. Organic fertilizers should be used primarily, with a small amount of compound fertilizer. Apply 20-30 kg (15-15-15) high-quality farmyard manure, 0.5-1 kg (15-15-15) NPK compound fertilizer, and 0.5-1 kg (15-15-15) calcium, phosphorus, and phosphate fertilizers per plant.