Devil's Tree (Alstonia scholaris)

Devil's Tree

Alstonia scholaris

Its tiered whorls of leaves evoke scholarly order, a stately evergreen tree. Common names: Devil's Tree, Scholar Tree.

Full sun
1–2/week
Moderate
🌱

Plant Needs

☀️
Sunlight Thrives in full to partial direct sunlight; indoor specimens require bright indirect light to avoid leaf burn
💧
Watering Water thoroughly when the top 2–3 cm of soil is dry; avoid overwatering to prevent root rot
🌡️
Temperature Requires warm tropical temperatures; cannot tolerate frost or temperatures below 10°C
🔍

Characteristics

  • Leaf: Whorled, oblong-lanceolate glossy dark green leaves arranged in tiered clusters around stems
  • Flower: Small, creamy-white, fragrant terminal cyme clusters
  • Stem/Bark: Grayish-brown smooth bark; milky white latex present in all tissues
🛠️

Care Guide

Watering

Keep soil consistently moist but not waterlogged; increase frequency during hot, dry periods

Fertilization

Apply balanced liquid fertilizer every 2 weeks. Avoid over-fertilization to prevent leaf burn

Banana peel compost tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 for root drench to support leaf and flower health
Pruning
  • Remove dead, damaged, or diseased branches in early spring to promote new growth
  • Trim overgrown stems to maintain desired size for indoor potted specimens
  • Thin dense foliage to improve air circulation and reduce pest infestation risk
⚠️

Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-confirmed toxic; ingestion leads to vomiting, diarrhea, lethargy, and potential neurological signs

Humans: Contains toxic alkaloids; ingestion causes nausea, vomiting, and dizziness; latex may irritate skin

📖

Garden Uses & Culture

Culture: Associated with scholarly institutions in some Asian regions due to its tiered leaf arrangement resembling academic ranks

Usage: Ornamental landscape tree; traditional medicinal uses in Ayurveda (not recommended for self-administration due to toxicity)