Early care of the mango orchard: practical tips for a bigger crop

Walk through a mango orchard in Chapainawabganj, Rajshahi or Naogaon in late September and the place feels almost abandoned. A few months ago it was crowded with baskets, vans and wholesale buyers; now, with the last Fazli and Ashwina picked, there is only the shade of dark green leaves. It is tempting to think the work is over until next summer. Experienced growers know the opposite is true: how much blossom the trees carry next year, how many young fruits hold on, and what the harvest looks like at market are largely settled in these quiet months.

Mango is one of the country's best-loved fruits and, increasingly, a serious commercial crop. Getting a high yield of good fruit depends on early care of the orchard: preparing the trees and the soil well before the blossom appears. Done properly, this care keeps the trees healthy, keeps disease and pests down and raises the crop. What follows sets out that work step by step: cleaning the orchard, pruning, testing the soil, feeding, watering, mulching, pest and disease control, and the particular care the trees need at flowering.

According to the Department of Agricultural Extension (DAE), Bangladesh produced about 2.67 million tonnes of mangoes in the 2024-25 fiscal year. Chapainawabganj, Naogaon, Rajshahi and Natore form the heart of the mango country, while commercial orchards have also spread in Satkhira, Meherpur, Dinajpur and the hill districts. Many new orchards stand on former paddy land or along the edge of rice fields, because once an orchard is established it pays, year after year, for decades.

The fruit's reputation has grown too. Langra, Khirsapat, Fazli and Ashwina from Chapainawabganj, Haribhanga from Rangpur, Himsagar from Meherpur and Nak Fazli from Naogaon now carry Geographical Indication (GI) status: official recognition that a product's character comes from the soil, climate and growing tradition of a particular place.

Exports, though, remain small. DAE figures show 1,321 tonnes of mangoes were exported in 2024, and shipments in 2025 were up by about 66 per cent. Foreign buyers want fruit that is clean-skinned, even in size and free of disease. That quality begins long before the blossom, in the way the orchard is looked after. The same holds at home: an unblemished mango fetches a better price in any bazar.

It is worth noting which varieties travel. DAE figures reported in the press show that Amrapali makes up about 80 per cent of mango exports, with Himsagar, Langra, BARI Aam-4 and Fazli also shipped abroad. Whatever the variety, buyers want fruit of even size, free of blemishes and insects, and that standard rests on care given to the orchard all year round.

Early care starts with an unhurried inspection of every tree. Look at the base of the trunk, the bark, the branches and the leaves. Note which branches have died back, where bark has split and is oozing gum, which leaves carry spots or a white fungal film, and which trees have been colonised by parasitic plants. A written note of what each tree needs makes the rest of the work far more orderly.

Then clear the ground around the trees. Weeds, fallen leaves and rotting fruit under the canopy shelter pests and disease. Fruit that falls and rots at the end of the season becomes a breeding ground for fruit flies and other insects. Keeping the ground clean is not about appearances; it is one of the cheapest ways to reduce next season's pest and disease pressure.

Removing dead, dry and diseased branches is among the most important jobs of the season. The government's Agriculture Information Service advises that once the fruit has been harvested, roughly in August, diseased, dead and unnecessary branches and parasitic plants should be cut out so that light and air can reach the inside of the canopy. Growers of late varieties can do the work as soon as their last fruit is down.

The reasoning is straightforward. Inside a dense, tangled canopy the sun does not reach and the air does not move; fungi thrive in the damp shade and insects hide there. After pruning the tree puts out new shoots, and mango blossom generally appears at the tips of healthy, mature shoots. Timely pruning therefore means more fruit the following season.

A fresh cut should not be left open. Painting the wound with a 1 per cent Bordeaux mixture keeps fungi from entering. Bordeaux mixture, a blend of copper sulphate and lime, has been used as a fungicide in orchards for well over a century. A 1 per cent mixture is usually made by dissolving 100 grams of copper sulphate and 100 grams of lime separately in water and then combining them to make 10 litres. It is best used on the day it is made.

The soil is the tree's larder, so it pays to know its condition before adding fertiliser. The most important measure is pH, which tells how acidic or alkaline the soil is. The ideal range for mango is 5.5 to 7. Below that, in more acidic soil, the tree cannot take up many nutrients properly, and fertiliser gives only part of its value.

The Soil Resource Development Institute (SRDI) offers soil testing across the country, and the upazila agriculture office can advise on sending samples. Taking soil from several spots in the orchard, mixing it into a single sample and having it tested shows which nutrients are lacking and how much lime is needed. Guesswork tends to mean too much fertiliser: higher costs and harm to the soil.

The most dependable way to build fertility is organic matter: well-rotted cow dung and compost. It keeps the soil crumbly, helps it hold water and feeds the beneficial microbes that live in it. As part of early care, growers are advised to give each tree 15 kilograms of organic manure and 1 kilogram of lime at the base. Lime corrects acidity and supplies calcium.

Alongside the manure, the trees need urea, triple superphosphate (TSP) and muriate of potash (MoP) in the right proportion. Urea supplies nitrogen for leaf and shoot growth; TSP supplies phosphorus for roots and flowers; MoP supplies potassium, which shapes the size, colour and sweetness of the fruit. The older the tree, the larger the dose it needs.

As a benchmark, guidance published by the Bangladesh Agro-Meteorological Information Service (BAMIS) gives a mature bearing tree 50 kilograms of cow dung, 2 kilograms of urea, 1 kilogram of TSP and 500 grams of MoP a year. The rule is to split this into two instalments: half before the monsoon, in May and June, and half after it, in September and early October. In other words, for many orchards the second instalment is due right now. For the exact dose in a particular orchard, a soil test and the advice of the upazila agriculture officer are the most reliable guides.

Young orchards follow a different schedule. Fertiliser is mixed into the planting pit itself; BAMIS guidance gives each pit 22 kilograms of cow dung, 150 grams of urea, 550 grams of TSP and 300 grams of MoP. The dose then rises gradually each year as the tree grows. Giving a young tree the ration of a mature one risks scorching its roots, so the dose should follow the tree's age.

Where the fertiliser goes matters as much as how much. Spread against the trunk it does little, because the fine feeder roots that take up nutrients lie out under the edge of the canopy. Loosening the soil in a ring along the drip line, working the fertiliser in and giving a light irrigation gets it to the roots quickly.

Mango trees root deeply and do not need frequent watering the way many crops do. In winter their demand is low, although the soil should not be allowed to dry out and crack; some moisture must remain. In the dry season growers are advised to irrigate every 10 to 15 days according to the trees' condition, particularly after fruit set in the heat of March and April, when a shortage of water makes young fruit drop.

Just before and during flowering, however, water must be handled with care. Too much can make the flowers fall, or push the tree into putting out new leaves instead of blossom. BAMIS guidance says irrigation should be stopped for the three months before flowering and then given at two points: once the blossom has emerged, and again when the young fruit reaches the size of a pea. With mango, timing matters more than quantity.

Mulching means covering the soil around the base of the tree with straw, dry leaves, water hyacinth or other organic material. It slows evaporation, keeps the soil moist for longer, smothers weeds and, as it rots, adds organic matter to the soil. For growers with limited irrigation in the dry season, it is particularly useful.

The mulch should not touch the trunk; leaving a small clear ring around it prevents rot at the collar. Weeds and rotting leaves under the trees should be removed regularly, since weeds compete for water and nutrients and decaying leaves harbour disease.

A mango crop suffers its heaviest losses at blossom and when the fruit is tiny. At the end of winter, in late January and February, when the trees are covered in flower, several diseases and pests can strike together. A spraying plan should therefore be ready in advance, so that action comes at the right moment and at the right dose, not after the damage is done.

The main diseases are powdery mildew, which coats blossom and young leaves with a white, powdery film, and anthracnose, which blackens and dries the blossom and later leaves dark spots on the fruit. A 1 per cent Bordeaux mixture spray is recommended against them. BAMIS advises a fungicide spray against anthracnose when the flower panicles are 10 to 15 centimetres long and again when the fruit is pea-sized, repeated two or three times at ten-day intervals, and a sulphur-based fungicide against powdery mildew two or three times at intervals of five to seven days.

Weather plays a large part. Persistent fog, overcast skies or drizzle at blossom time raise the humidity, and fungal diseases such as anthracnose and powdery mildew then spread fast. It pays to watch the forecast at this stage. BAMIS publishes crop-specific agro-meteorological advice that helps in choosing spray days; a spray applied just before rain is washed off, and the money with it.

Among insects, the mango hopper is the best-known enemy. Hoppers suck sap from the blossom, which withers and drops, and the sticky honeydew they excrete grows a black sooty mould that covers the leaves. BAMIS guidance calls for a cypermethrin-based insecticide once the panicles are 3 to 4 centimetres long and again when the fruit is pea-sized. Bio-pesticides can also be used to keep hoppers in check.

Protecting the fruit from fruit borers also needs preparation. Pheromone traps are useful here. A pheromone is an insect's own chemical signal; the trap carries a synthetic version that lures male insects in and holds them, so fewer eggs are laid. Traps reduce the need for spraying and with it the risk of chemical residues on the fruit, a serious concern in export markets.

Whatever is sprayed, the dose and safety instructions on the label must be followed. It is best to avoid insecticide sprays at full bloom, when bees and other pollinators visit the orchard; without them, even a tree full of flowers sets little fruit. When in doubt about what to spray and when, the upazila agriculture office or the local sub-assistant agriculture officer is the safest source of advice.

Once the blossom emerges, the tree's needs change. Growers are advised to cut back on nitrogen and increase potassium at this stage. A tree given plenty of nitrogen busies itself with new leaves and shoots and diverts energy away from flowers and fruit. Potassium strengthens the blossom and young fruit and reduces drop.

Extra water or fertiliser at flowering should be avoided. Many growers pour on more in the hope of a bigger crop, only to see the flowers fall. However much blossom a tree carries, only a small share ever becomes ripe fruit; the aim of good care is to make that share as large as possible.

Set out as a calendar, the advice above gives a clear picture of the year. Timing shifts by a few weeks from region to region and variety to variety, but in broad terms the work runs like this:

• After the harvest, around August: prune dead, diseased and unwanted branches and parasitic plants; paint the cuts with Bordeaux mixture.
• September to early October: the second instalment of fertiliser with manure and, where needed, lime; a light irrigation afterwards.
• October to December: clean the orchard, control weeds, mulch the base; withhold irrigation for the three months before blossom.
• Late January, as the blossom emerges: spray against hoppers when panicles are 3 to 4 centimetres long and against anthracnose at 10 to 15 centimetres; one irrigation.
• February, at full bloom: avoid insecticide sprays, reduce nitrogen and raise potash, and give no extra water.
• March, when the fruit is pea-sized: the second round of sprays and an irrigation; then water every 10 to 15 days in the heat, and pheromone traps against fruit borers.

Keeping a notebook of what was done and when, and which product was applied at what dose, also pays. It helps explain next year why a particular tree bore poorly, and exporters and large buyers often ask to see exactly this kind of spray record.

Early care done by the book shows its results in the very next season. Drawing on field experience and the advice of agricultural specialists, the benefits are these:

• Less flower drop.
• Fewer pest and disease attacks, and lower spending on pesticides.
• Better growth and a bigger crop.
• Larger fruit of better quality and flavour, which sells for more.
• Trees that keep producing well for many years.

The last point deserves emphasis. A mango tree bears for decades. Trees in an orchard that is cared for every year stay healthy and tend to swing less sharply between heavy and light crops, while neglected orchards are more prone to a bumper year followed by almost nothing.

Carried out at the right time and in the right way, early care raises both the size and the quality of the mango crop. Pruning, soil testing, balanced feeding, carefully timed irrigation, mulching and timely pest control are none of them expensive on their own, but together their effect is large. A well-tended orchard gives more than a good harvest; it can become a genuinely profitable farm business.

Now, when there is no fruit on the trees, is the real working season. The branch pruned today and the manure spread at the base of a tree this month are where next winter's blossom begins, and where next summer's well-priced mangoes come from. Growers who follow this advice can expect orchards that are more productive and more profitable.

Photo: A mango orchard beside a paddy field, SyedAminul / Wikimedia Commons (CC BY-SA 4.0)