Simple overview

Mango is the Top End's signature tree crop. Kensington Pride (KP) is by far the main Australian variety (~90% of the crop); elephant/other types are also grown. Mangoes grow well around Darwin and Katherine, but the two classic Top End headaches are trees that grow too vigorously and flowering that is unreliable — which is why growers manage canopy size and sometimes use flowering aids. This pack is practical for a beginner but keeps the technical grower detail in the Advanced view.

Best climate

Loves hot tropical conditions. In warm, humid Top End weather Kensington Pride can flower and fruit unreliably, so canopy management and flowering timing matter. Not frost tolerant.

Best season (Darwin / NT)

Mangoes are grown throughout the Darwin and Katherine regions. Establish young trees so they settle before the wet season, in a well-drained spot. (Confirm the best local planting month with your nursery and the NT mango extension pages.)

Soil and beds

Deep, free-draining soil is best. Mango dislikes waterlogging; on heavier ground plant on a mound and keep the root zone from sitting wet.

Drainage

Needs good drainage. Waterlogged roots stress the tree and worsen root and trunk disease.

Water

Water to establish young trees and through fruit development. Many growers deliberately ease off water before flowering to help the tree switch from growing to flowering — get local advice on timing.

Feeding (fertigation)

The four key mango nutrients are nitrogen (N), potassium (K), calcium (Ca) and boron (B). Feed potassium after harvest, during flowering and especially during fruit development. Base the program on soil and leaf tests — do not guess.

Foliar feeding

Boron and zinc are commonly applied around flowering/fruit set to support pollen and set (about 40% of the boron for the year is applied through flowering). Calcium is hard to get into the fruit — finer particle sprays are taken up better. Always follow the product label rate.

Most important nutrients

Nitrogen, potassium, calcium and boron — the four that drive mango yield and fruit quality.

Common deficiencies

Boron (poor flowering/fruit set), calcium (fruit quality/internal disorders), potassium; zinc on some soils.

Pests in plain words

Watch for mango leafhoppers (small hoppers on flower panicles and young leaves — they can wreck flowering), fruit fly (stings fruit, causing breakdown), mango scale (yellowing leaves, pink fruit blemishes), thrips, mites, caterpillars/tip borers, mealybugs, and the mango seed weevil. Leafhoppers and fruit fly are the big commercial ones.

Diseases in plain words

Anthracnose is the number-one wet-season disease — black spots on leaves, flowers and fruit, worst in humid, rainy weather (about 24–32 °C). Bacterial black spot, mango scab, powdery mildew and stem-end rot also occur. Sapburn (skin damage from the fruit's own sap at picking) is a quality problem managed at harvest, not a disease.

Spacing and plant numbers

Plant spacing: 600–1000 cm   Row spacing: 800–1200 cm

At 800 cm spacing that is about 12 plants per 100 m row.

Harvest quality problems

Harvest maturity is judged by dry matter, flesh colour and the sinker test — not by skin colour alone. Australian guidance: dry matter rises about 0.72%/week from ~11% (stone hardening) to ~22% (full maturity); KP/Calypso are picked when about 90% of fruit are ≥15% dry matter (mean ~16.5%). Sinker test: in a 1.0% salt solution (100 g salt / 10 L), if 9 of 12 random fruit sink they are ready. Cut a sample — flesh should be turning lemon-yellow near the stone. Pick and de-sap in the MORNING to reduce sapburn (sap from the broken stem burns the skin).

Beginner mistakes to avoid

• Letting trees grow too big and shady (hurts flowering and spraying)
• Expecting reliable flowering without managing canopy/timing
• Judging ripeness by skin colour instead of dry matter / sinker test
• Harvesting in the heat of the day (more sapburn)
• Skipping anthracnose protection through the wet
• Using growth regulators (PBZ/KNO3) by guesswork instead of the label/permit

Scouting checklist

• Leafhoppers on flower panicles and leaf undersides
• Fruit fly stings / breakdown on developing fruit
• Scale and sooty mould on leaves and stems
• Anthracnose black spots on flowers, leaves and fruit
• Bacterial black spot (angular black lesions) after storms
• Tip borer damage in young shoots

Task calendar Sample — no tasks are created until you confirm a trial plan

Photos

Chemical options (APVMA only)

Live from the APVMA PubCRIS finder — registration, WHP, rate and the source badge come from the finder API at view time, never stored here. Always confirm the current APVMA label before use. Pests/diseases without a finder filter (and biosecurity diseases) are not shown here — check the label or a permit directly.

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Fertiliser options by goal

Shortcuts into your Fertilizer Library. These filter by nutrient or use method — they are not prescriptions, and fertilisers are never pest/disease treatments unless APVMA-registered.

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Sources