Growing Mangoes

Choose varieties based on your target market, climate, and harvesting season. For local fresh markets, prioritize flavor: Alphonso, Kensington Pride, Ataulfo (Honey/Manila), or regional favorites. For export, Tommy Atkins, Kent, Keitt, and Palmer offer the required shelf life and appearance. For processing (juice, dried), fibrous varieties like Totapuri work well.

Always plant grafted or budded trees - seedling mangoes are variable in quality and may take 6-10 years to fruit. Grafted trees bear in 3-4 years. Common rootstocks include Turpentine, Gomera-1, and polyembryonic varieties. Purchase from certified nurseries; expect $10-25 per tree depending on size and variety.

Mangoes need full sun and excellent drainage. They tolerate a wide range of soils (sandy loam to clay) as long as drainage is adequate. Optimal pH is 5.5-7.5. Avoid frost pockets - young mango trees are damaged at temperatures below 1°C, and flowers are destroyed by even light frost.

Space trees 8-12m apart for most varieties (70-120 trees per hectare). Dig planting holes 80x80x80cm, mix in 5-10 kg of compost. In areas with heavy clay or high water tables, plant on raised mounds. Water thoroughly after planting and mulch with 10-15cm of organic material, keeping it away from the trunk. Protect young trees from strong winds with stakes.

Shape young mango trees to develop a strong, balanced canopy. Allow 3-5 well-spaced scaffold branches to develop from the main trunk at 60-100cm height. Remove competing vertical leaders, inward-growing branches, and low-hanging growth. The goal is an open vase shape that allows light penetration and air circulation.

During the first 3 years, remove any flower panicles that appear - this redirects energy into vegetative growth and establishes a larger canopy that will support heavier crops in the long term. Once trees are well-established (year 3-4), allow flowering and fruiting.

Young trees (1-3 years): Apply 200-500g of balanced NPK (10-10-10) every 3 months during the rainy season. Supplement with foliar zinc and manganese sprays. Bearing trees (4+ years): Shift to higher potassium formulations during fruit development. A mature tree producing 100+ fruits needs approximately 2-4 kg of NPK fertilizer per year, split into 3-4 applications.

Apply nitrogen after harvest to promote the vegetative flush that will carry next season's flowers. Reduce nitrogen 2-3 months before expected flowering - excess nitrogen promotes vegetative growth at the expense of flowers. Potassium application during fruit fill improves fruit size, color, and sugar content. Organic growers use compost, fish meal, and wood ash (excellent potassium source).

Mango flowering is triggered by cool night temperatures (10-15°C) or dry stress, depending on the variety and region. In tropical lowlands without a cool season, flower induction may require chemical assistance: potassium nitrate (KNO3) spray at 2-4% concentration on mature flush, or paclobutrazol (Cultar) soil drench to suppress vegetative growth and promote flowering.

To reduce alternate bearing: prune immediately after harvest to stimulate a uniform vegetative flush, ensure adequate nutrition (especially potassium) during heavy crop years, and thin fruit on heavily loaded trees by removing 30-50% of panicles early in development. Some growers stagger pruning blocks to ensure some trees flower every year regardless of the alternate bearing cycle.

Anthracnose (Colletotrichum gloeosporioides) is the #1 mango disease - it causes black spots on flowers, fruits, and leaves, especially during wet flowering periods. Preventive copper or mancozeb sprays during flowering are essential. Post-harvest hot water treatment (52°C for 5 minutes) controls anthracnose on harvested fruit.

Mango seed weevil and fruit flies are major insect pests. Fruit flies (Bactrocera spp.) lay eggs in ripening fruit; control with protein bait traps, early harvesting, and sanitation (collecting fallen fruit). Powdery mildew affects flowers and young fruit in dry weather - sulfur sprays provide good control.

Harvest timing depends on variety and market. For local fresh sales, pick at "mature green" stage (full shoulders, slight color break) and allow to ripen at room temperature. For export, harvest at "three-quarter" maturity for maximum shelf life. Use a picking pole with a cutting blade and collection bag to harvest without dropping fruit (drop damage causes internal bruising).

Post-harvest handling: desap fruit in a 1% lime solution to prevent sap burn marks, wash, sort by size, and pack in single-layer boxes. Hot water treatment (HWT) at 52°C for 5 minutes controls anthracnose and fruit fly larvae for export markets. A mature tree yields 100-200 fruits (30-100 kg), with exceptional trees producing 200+ kg. The harvest season is typically 2-4 months, varying by variety.