How to Grow Black Tree
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Black Tree
Alstonia scholaris
treeThe Black Tree (Devil's Tree) is a large, fast-growing tropical deciduous tree native to Asia and Australia, known for its dark bark and umbrella-like canopy of whorled branches. It can reach 40-80 feet tall and is valued for its shade, timber, and medicinal properties. The tree produces clusters of small white or pale yellow flowers followed by long, slender seed pods.
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Example Black Tree timeline · Pittsburgh, PA (Zone 6b)
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Plant Black Tree
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Black Tree
Late summer into fallBefore the first fall frost (≈ Nov 8)
Sample dates for Pittsburgh, PA. Sign up to get exact Black Tree dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in tropical and subtropical zones 10b-12; not frost-tolerant
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Get my Black Tree timeline →Growth Stages
Seedling
4-8 weeksYoung tree with 2-4 true leaves, thin stem, still establishing root system
Provide bright, indirect light. Keep soil consistently moist but not waterlogged. Protect from strong winds and direct intense sun. Use well-draining seed-starting mix.
Juvenile Growth
6-12 monthsTree 1-3 feet tall with developing main trunk and lower branch formation; characteristic whorled branching pattern beginning to appear
Transplant to larger container or in-ground location. Begin light pruning to encourage desired form. Maintain consistent moisture and full sun exposure. Apply balanced fertilizer monthly.
Vegetative Growth
2-4 yearsRapid height and canopy expansion; tree 3-20 feet tall with well-established umbrella-like crown and dark bark development
Prune lower branches for clearance if used as shade tree. Maintain regular watering, especially during dry periods. Apply slow-release fertilizer 2-3 times yearly. Mulch around base.
Flowering & Reproduction
Continues annually once matureMature tree produces small clusters of fragrant white or pale yellow flowers, followed by long, thin cylindrical seed pods (up to 12 inches)
Flowering indicates maturity. Pods will naturally split and disperse winged seeds. Prune selectively to maintain shape. Continue fertilizing and watering for vigor.
Mature Tree
10-100+ yearsFully developed 40-80 foot tall tree with dense canopy, thick dark trunk, and established ecosystem benefits
Minimal inputs needed once established. Prune dead or crossing branches. Monitor for pests/disease. Deep watering during extended drought. Tree provides excellent shade and wildlife habitat.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Prune affected branches; spray with neem oil or insecticidal soap; encourage natural predators
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Increase humidity; spray with water; apply neem oil if severe
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Maintain tree vigor through proper care; prune and remove affected wood; use wood borers traps if needed
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Improve air circulation; avoid overhead watering; remove affected leaves; apply fungicide if severe
Uses
Traditional Herbal Remedy
MedicinalThe bark, roots, and leaves have been used in Ayurvedic and traditional Asian medicine for centuries to treat respiratory conditions, fever, and inflammation. Modern research has validated some antimicrobial and antioxidant properties. [source]
Timber & Wood Products
HouseholdThe lightweight but strong wood is traditionally used for canoes, furniture, and construction. It's valued for being easy to work with and having good acoustic properties. [source]
Shade Tree & Habitat
WildlifeThe dense canopy provides excellent shade in tropical regions and creates habitat for birds, insects, and other wildlife. Often planted in yards, parks, and along streets. [source]
Respiratory Support
MedicinalTraditionally used to alleviate asthma, bronchitis, and cough. The latex and leaf extracts contain alkaloids studied for potential bronchodilator effects. [source]
Flavoring Agent
CulinaryYoung leaves are occasionally used as a subtle flavoring in traditional Asian cuisine and herbal beverages, imparting a bitter, slightly medicinal taste. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Seed pods mature 2-3 months after flowering and naturally split when dry, dispersing winged seeds. Harvest pods for propagation before natural splitting, or allow to drop naturally. Young leaves can be harvested year-round for medicinal uses.
Fun Facts
- 🌱 The Black Tree earned its common name from its very dark, almost black bark that develops with age, creating striking contrast with its bright green canopy.
- 🌱 In its native regions, Alstonia scholaris is called the 'Devil's Tree' in some areas due to folklore suggesting spirits gather in its branches, yet it's also revered as a sacred tree in many cultures and planted in temples.
- 🌱 The tree produces a toxic white latex sap that was historically used as insecticide and rat poison; this sap should never be ingested and can cause skin irritation, so always wear gloves when handling the plant.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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