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Black plum

Syzygium cumini · Myrtaceae

The gardener's calendar

The right move for September

In autumn, ease off feeding and take the chance to clean up around black plum and prepare for winter.

JFMAMJJASOND Planting

ID card

Foliage
Evergreen, leathery and glossy
Flowering
April to June, small fragrant white flowers
Fruits
Purple to black berries, edible
Adult size
8 to 15 m in height, spreading habit
Growth
Fast in warm climates
Hardiness
Tropical and subtropical (freezes below 10°C)
Origin
Indian subcontinent

Care

Light Exposure

Your Syzygium cumini loves full sun for optimal fruiting, but tolerates partial shade. In temperate climates, grow it in a warm greenhouse or well-lit conservatory. Gradually expose the plant to sunlight to prevent leaf burn.

Watering

Keep the soil regularly moist without waterlogging, especially during growth and flowering. Reduce watering in cool periods. In pots, ensure water drains well and let the substrate dry slightly between waterings.

Soil

Choose rich, well-draining substrate that is slightly acidic to neutral. A mix of potting soil, compost and perlite works well. In tropical soil, Syzygium cumini adapts to various soils but fears waterlogging.

Fertilizer

Apply balanced diluted fertilizer every 15 days during the growing season. Prefer a potassium-rich formula during flowering and fruiting periods to boost fruit production.

Pruning and Cutting

Pruning is not essential; limit it to removing dead or diseased branches. Pinch the tips of young shoots to encourage dense branching. Remove faded fruits to encourage new fruiting.

Diseases and Pests

Watch for mealybugs and spider mites in dry conditions. Check foliage regularly and mist with water if needed. In excessive humidity, fungi may affect roots; improve drainage and reduce watering.

Did you know?

Syzygium cumini, also called jambul in India, has been revered since antiquity in Ayurveda for its supposed beneficial properties. French botanist Odoardo Beccari praised it in the 19th century, contributing to its spread beyond Asia. In India, its blue-black fruits stain lips and hands with intense purple, earning it the popular nickname of 'the fruit that colors'.

Where to buy it

Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.

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Tips generated and checked by Viridia — adapt them to your local climate.