Alstonia angustifolia is a medium to large tree native to Southeast Asia, known for its striking red foliage, making it a visually appealing ornamental.
At-a-glance light, water, soil, and growing conditions from plant data
Bright indirect light
75% intensity
Prefers full sun to partial shade. Protect from intense, direct afternoon sun.
Consistent moisture
50% intensity
Keep soil moist, but avoid waterlogging. Allow top layer to dry slightly.
Well-drained
50% intensity
Warm
75% intensity
Thrives in temperatures between 18-27°C. Protect from frost and cold drafts.
Moderate feeding
50% intensity
Feed with balanced fertilizer during growing season, reduce in winter.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
Unknown
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water Alstonia angustifolia regularly, keeping the soil consistently moist but not waterlogged. Allow the top inch of soil to dry slightly between waterings.
Reduce watering during cooler, dormant periods, but never let the soil become completely dry. Ensure good drainage to prevent root rot.
Prune Alstonia angustifolia to shape and remove dead or damaged branches. Light pruning can be done year-round to maintain desired form.
Heavy pruning is best performed in late winter or early spring before new growth begins. This encourages bushier growth.
Propagate Alstonia angustifolia from semi-hardwood cuttings taken in summer. Use a rooting hormone to encourage root development.
Plant cuttings in a well-draining potting mix and keep them in a warm, humid environment with bright, indirect light until established.
Repot young Alstonia angustifolia plants every 2-3 years, or when root-bound, typically in spring. Choose a pot that is only slightly larger than the current one. Use a well-draining potting mix.
Mature plants may not need frequent repotting.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Red-Leaved Pulai (Alstonia angustifolia)
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Gentianales |
| Family | Apocynaceae |
| Genus | Alstonia |
| Species | Alstonia angustifolia |
Similar in genus Alstonia
Answers based on plant encyclopedia data
