Java plum
Syzygium cumini
Black Jamun
About this plant
Syzygium cumini, commonly known as Java plum or black plum, is a tropical evergreen tree known for its dark purple edible fruit. The fruit is sweet and slightly tart, often used in jams, jellies, and traditional medicine. The tree has glossy green leaves and produces fragrant white flowers. It is valued both for its fruit and as a shade tree in tropical regions.
Taxonomy
- Genus
- Syzygium
- Family
- Myrtaceae
- Higher classification
- Myrtales
- Plant type
- Tree
- Lifespan
- Perennial
Origin & Distribution
- Native region
- India, Pakistan, Bangladesh, Sri Lanka, Myanmar
- Distribution
- Native to the Indian subcontinent and Southeast Asia; widely cultivated in tropical and subtropical regions worldwide.
Care
- Light preference
- Full sun
- Suitable locations
- Outdoor, Balcony, Greenhouse
- Preferred window facing
- South-facing, West-facing
- Watering frequency
- Moderate
- Watering interval
- 5–10 days
- Humidity
- Normal
- Minimum
- 10 °C
- Maximum
- 40 °C
- Optimal
- 20-30 °C
- USDA hardiness zones
- 10-12
- Soil pH
- 6.0-7.5 (slightly acidic to neutral)
- Soil type
- well-draining loam
Watering. Water regularly during the growing season but allow the soil to dry slightly between waterings. Reduce watering in winter or dormant periods.
Fertilizing. Apply a balanced fertilizer in early spring and mid-summer to support healthy growth and fruiting. Organic compost or manure can also be used annually to enrich the soil.
Syzygium cumini is a hardy tree that grows well in warm climates. It prefers full sun but can tolerate some shade. It needs moderate watering and well-draining soil. The tree is relatively low-maintenance but benefits from occasional pruning to maintain shape and health.
Propagation
- Propagation methods
- Seeds, Cuttings
- Care difficulty
- Medium
Ornamental features
- Flowering
- Yes
- Flowering period
- spring
Glossy green leaves, fragrant white flowers, and attractive dark purple fruit.
Toxicity & Safety
- Toxic to humans
- Non-toxic
- Toxic to pets
- Non-toxic
- Weed potential
- Low spread
Non-toxic to humans and pets; the fruit is edible and safe to eat.
Allergy information
- Allergy risk
- Low
- Allergy triggers
- Pollen, Skin contact
- Pollen level
- Moderate
Syzygium cumini may cause mild allergic reactions in sensitive individuals, mainly due to pollen. People with pollen allergies should be cautious during its flowering season. To reduce exposure, avoid close contact with flowers and wash hands after handling the plant.
Common problems
Overwatering can cause root rot, and poor drainage may lead to fungal diseases. Pests like aphids or scale insects can occasionally appear. Lack of sunlight may reduce fruit production.
Uses
Grown for its edible fruit, shade, and ornamental value. The fruit is used in cooking and traditional medicine.
Notes
Prune after fruiting to maintain shape and remove dead branches. Repotting is not applicable as it is typically grown outdoors as a large tree. It tolerates drought once established but grows best with regular watering.