5 Seeds Alstonia Scholaris Blackboard Tree Evergreen Tropical Ornamental

Species: Alstonia scholaris
Common Name: Blackboard Tree, Devil's Tree
Type: Evergreen tropical tree
Plant Habit: Upright, spreading canopy
Sun: Full sun to partial shade
Soil: Well-draining, loamy or sandy soil
Germination: Scarify seeds lightly, soak 24 hours, sow in warm, moist medium at 75-85°F
Sowing: Sow seeds 0.25 inch deep, keep consistently moist
Spacing: Plant 15-25 feet apart for mature growth
Days to Harvest: Not applicable
Zones: 10-11 (tropical)
Notes: Produces fragrant white flowers and ornamental, whorled foliage; ideal for large landscapes or containers in warm climates. Grows up to 30-40 feet tall in optimal conditions.

These seeds offer the chance to grow a distinctive evergreen tree known for its layered, whorled leaves and clusters of small, fragrant blooms. The blackboard tree adds vertical interest and a tropical ambiance to gardens, patios, or greenhouse collections, making it a standout ornamental for those who appreciate unique botanical forms.

This tree thrives in warm, frost-free environments and is suited for use as a shade tree, specimen plant, or large container subject. Its seeds require gentle scarification and consistent warmth to germinate, after which it develops steadily into a structured, upright tree with time. As it matures, it becomes a low-maintenance addition to suitable climates, offering year-round greenery and seasonal floral interest.