Fruit page format/Rose apple

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Rose apple (Syzygium jambos) is an evergreen tropical tree grown for its fragrant flowers and crisp, rose-scented fruit.

Ripe fruit on the branch.
Rose apple (Syzygium jambos)
Scientific name	Syzygium jambos (L.) Alston
Common names	Rose apple, Malabar plum, pomarrosa, jambu mawar
Genus	Syzygium
Family	Myrtaceae
Order	Myrtales
Growth form	Evergreen tree
Mature size	About 7.5–12 m in ground; smaller with pruning
Climate	Tropical to warm subtropical; USDA zones 9–11, with zone 9 marginal
Propagation	Fresh seed; air-layering for clonal plants
Germination	About 10–120 days from fresh seed
Years to fruit	About 3–4 years from seed under favorable conditions
Pollination	Generally self-fertile; insects visit the flowers
Fruit season	Varies by climate; often follows the wet season

Identification and description

Syzygium jambos has opposite, lance-shaped leaves, often with a rosy flush of new growth. The large cream-colored flowers are made mostly of conspicuous stamens. The nearly round or slightly pear-shaped fruit is usually pale yellow to whitish, sometimes pink-blushed, with crisp flesh and a hollow center containing loose seeds. A rosewater-like scent is a useful clue.

It can be confused with wax apple (S. samarangense), Malay apple (S. malaccense), watery rose apple (S. aqueum), and other plants sold under the name rose apple.

Rosy new foliage.

Growing

Rose apple prefers warm, mostly frost-free conditions, regular moisture, and full sun once established. Young plants benefit from partial shade and should be transplanted while small because root disturbance can set them back. It tolerates a range of soils, including wet sites, but deep soil with reliable moisture is generally productive. Protect it from repeated freezes and direct salt spray.

Mature tree habit.

Soil

Native rose apple habitats include moist lowlands, stream margins, and other deep soils with regular water movement. Alluvial loam with leaf litter is a useful model, although the tree can tolerate sand and limestone. The natural habitat may be wet, but roots should not remain in stagnant, oxygen-poor water.

Sun and humidity

Give established trees full sun for reliable flowering and fruiting; young plants tolerate or benefit from partial shade. Warm, humid air and protection from drying winds resemble the native environment. Air movement remains important in dense plantings.

Seasonal changes

Warm wet-season growth is followed in many climates by a drier flowering period and fruit development as rains return. Cooler subtropical winters reduce growth and may prevent fruiting even where the tree survives. Water consistently during fruit development, but do not keep the root zone saturated during cool weather.

Propagation

Fresh seed is the usual method. The seeds should not be allowed to dry and do not normally require stratification. Sow them shallowly in a moist medium and separate seedlings before their roots become crowded. Seedlings may be reasonably close to the parent, but superior fruiting plants are better preserved by air-layering or another clonal method.

Flowering, fruiting, and harvest

The species is generally self-fertile and is visited by bees and other insects. Flowering and harvest vary with climate; in tropical regions flowering may be seasonal or sporadic. Fruit commonly follows flowering within several weeks. Harvest at full color because the fruit bruises easily and has a short storage life.

Fruit and uses

The crisp, aromatic fruit is usually eaten fresh. It can also be made into jam, jelly, syrup, preserves, or desserts. The hollow fruit is light and delicate. Seeds and other plant parts have been reported as hazardous; use a reliable source before recommending medicinal or food use beyond the ripe flesh.

Photos

Fruit cut open, showing the loose seeds.

Cream-colored flowers.

Commentary

Share your experience growing this plant on the Rose apple commentary page. Notes about climate, propagation, container culture, flowering, fruit quality, pests, and unusual local selections are all welcome.

When possible, include your location or climate, how the plant was propagated, its age, and any conditions that may help other growers understand the result.

Sources

• Morton: Rose Apple, Fruits of Warm Climates.
• Useful Tropical Plants: Syzygium jambos.
• Plants of the World Online, taxonomy and accepted-name reference.

Image credits

• Fruit: PMATAS, CC BY-SA 4.0.
• Young leaves: Tonton Bernardo, CC BY-SA 3.0.
• Tree: Forest & Kim Starr, CC BY 3.0.
• Flowers: Ajtjohnsingh, CC BY-SA 4.0.
• Fruit and seeds: JonRichfield, CC BY-SA 3.0.