Jack tree (Sinojackia xylocarpa)

Jack tree

Jack tree is a small tree or large shrub that can be seen in arboretums and botanical gardens throughout the world, though it's its populations in the wild are very scarce. The species is listed as "vulnerable" on the IUCN Red List of Threatened Species and is threatened by habitat loss.

Scientific classification

Species

Jack tree (Sinojackia xylocarpa)

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Perennial

Lifespan

Tree, Shrub

Plant Type

Green

Leaf Color

2 cm to 2.5 cm

Flower Size

White

Flower Color

Deciduous

Leaf type

15 - 35 ℃

Ideal Temperature

Spring

Growth Season

Images of Jack tree

Distribution of Jack tree

Distribution Map

Jack tree is native to temperate regions of eastern Asia. It has expanded beyond its indigenous range through cultivation, flourishing in various temperate locales globally wherever horticultural enthusiasts and botanical gardens value its ornamental qualities.

Native

Cultivated

Invasive

Introduced

No species reported

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Habitat

Forest edges

Hemisphere Trend Curve

Northern

Sorthern

Quickly Identify Jack tree

Deciduous tree reaching 20-30 feet (6-9 meters) tall.

Large, oblong to ovate leaves with glossy green top and paler underside.

Clusters of fragrant, star-shaped white flowers in spring.

Olive-shaped drupes, initially green, turning yellow to brownish when ripe.

Bark is gray and can become furrowed with age.

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Care Guide for Jack tree

Every 3 weeks

Water

Full sun

Sunlight

15 - 35 ℃

Ideal Temperature

Garden Soil

Soil Type

Water: Jack tree prefers moderate moisture and benefits from consistent, but not excessive, watering. Once established, it is drought-tolerant. Watering every three weeks is ideal, allowing soil to slightly dry. Mulching helps retain moisture and protect against temperature extremes.

Fertilize: Fertilize jack tree with balanced N-P-K fertilizer monthly in spring and summer, reducing in autumn, and stopping in winter. Young jack tree need consistent feeding for strong roots, while mature jack tree require less. Adjust based on soil fertility and jack tree's response, ensuring thorough watering post-application.

Pruning: Jack tree features beautiful white flowers and distinctive fruit. Prune in early spring by removing dead branches and thinning the canopy to enhance air circulation. Regular pruning promotes growth and blooming. Use clean, sharp tools to prevent disease and ensure clean cuts for healing.

Propagation: Propagate jack tree via cuttings from a healthy stem. Use a clean diagonal cut, apply rooting hormone, and plant in well-draining mix. Keep the cutting moist but not waterlogged, providing warmth and indirect light to promote root growth.

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