Java Plum (Syzygium cumini)

Java Plum

Syzygium cumini

Its glossy leaves carry sweet, tart fruit like tiny purple jewels. Evergreen tropical tree; common names: black plum, jambul.

Full sun
2–3/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; tolerate brief afternoon shade in extremely hot climates for reduced leaf scorch
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Watering Water deeply when the top 5 cm of soil is dry; avoid waterlogging to prevent root rot
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Temperature Thrives in warm tropical and subtropical temperatures; protect from frost below 10°C to prevent leaf damage
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Characteristics

  • Leaf: Opposite, elliptical, glossy dark green leaves with a reddish tint when newly emerged
  • Flower: Clusters of small, fragrant white or pale yellow star-shaped blooms
  • Fruit: Oval purple-black berries with sweet-tart flesh and a single large, hard seed
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Care Guide

Watering

Keep soil consistently moist during active growth and fruiting season

Fertilization

Feed with balanced organic fertilizer every 4 weeks. Avoid over-fertilizing to prevent excessive foliage growth at the expense of fruiting

Banana peel compost tea:Use only fully composted banana peels; steep in water for 24 hours, dilute 1:20 for root drench, and filter out solids to avoid pest infestations and odor
Pruning
  • Remove dead, diseased, or crossing branches in late winter to improve airflow
  • Thin overcrowded branches during spring to promote better light penetration and fruiting
  • Trim dwarf indoor specimens in early spring to maintain desired size and shape
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic due to hypoglycin A in seeds; may cause vomiting, diarrhea, lethargy, and hypoglycemia

Humans: Seeds contain hypoglycin A; ingestion may cause mild gastrointestinal upset, nausea, or stomach pain

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Garden Uses & Culture

Culture: Symbolizes prosperity in some South Asian cultural traditions; used in traditional Ayurvedic medicine

Usage: Edible fruit for jams, jellies, and beverages; ornamental shade tree for tropical landscapes