Water
Water regularly, keeping the soil consistently moist but not waterlogged. Allow the top 2-3 cm of soil to dry out slightly between waterings. Reduce watering in winter when the plant is less active.
Ensure good drainage to prevent root rot.
Also known as Allamanda · Hanchinal
Safety note: This plant may be toxic to humans and pets. See toxicity details.
Purple Allamanda (Allamanda blanchetii) is a stunning tropical shrub or vine displaying vibrant, trumpet-shaped purple flowers throughout the year.
At-a-glance light, water, soil, and growing conditions from plant data
Full sun
100% intensity
Prefers at least 6-8 hours of direct sunlight daily for best flowering.
Regularly, but allow drying between waterings
75% intensity
Keep soil moist, avoid waterlogging. Reduce in winter.
Well-drained
50% intensity
Warm
75% intensity
Thrives in temperatures between 18-27°C. Protect from frost; it is not cold-hardy.
Outdoor
50% intensity
During growing season
50% intensity
Feed every 2-4 weeks with a balanced liquid fertilizer, diluted.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | Yes 4/5 intensity |
| Toxic for pets | Yes 5/5 intensity |
| Edible | No |
Irritant
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water regularly, keeping the soil consistently moist but not waterlogged. Allow the top 2-3 cm of soil to dry out slightly between waterings. Reduce watering in winter when the plant is less active.
Ensure good drainage to prevent root rot.
Prune to shape the plant and encourage bushier growth. Remove spent flowers and any dead or leggy stems. Prune hard in late winter or early spring before new growth begins to maintain size and form.
Wear gloves as sap can irritate skin.
Propagate from semi-hardwood cuttings taken in late spring or summer. Dip the cut end in rooting hormone and plant in a well-draining potting mix.
Keep the cuttings consistently moist and warm in a bright, indirect light location until they root.
Repot every 2-3 years or when the plant becomes root-bound. Choose a pot that is slightly larger than the current one. Use a well-draining potting mix, such as a blend of potting soil and perlite.
Repot in spring before the growing season starts.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Purple Allamanda (Allamanda blanchetii)
Where Purple Allamanda (Allamanda blanchetii) is found

Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Magnoliopsida |
| Order | Gentianales |
| Family | Apocynaceae |
| Genus | Allamanda |
| Species | Allamanda blanchetii |
Similar in genus Allamanda
Answers based on plant encyclopedia data