Allamanda
Allamanda cathartica
Allamanda is a vigorous climber with glossy leaves and large, golden-yellow trumpet flowers through the warm months. It covers fences and arches quickly, and bush forms suit large pots.
Photo: Billjones94 · CC BY-SA 4.0, via Wikimedia Commons
Essential Care Requirements
Light
Full sun
Watering
Moderate
Water regularly in the growing season; reduce in winter.
Soil
Rich, well-drained soil; pH 6.0–7.0.
Temperature and humidity
10–40 °C · High humidity
Feeding
Feed monthly in the growing season with a balanced fertilizer.
Pruning and propagation
Propagate by stem cuttings, layering
Prune in late winter to control size; flowers form on new growth.
All parts are toxic if eaten, and the milky sap irritates skin.
Top Cultivation Tips
Tie stems to a support; it does not twine strongly.
Wear gloves when pruning.
Give full sun for the most flowers.
Purple and pink varieties are also available.
Common problems
Aphids
Small, soft-bodied insects that cluster on new shoots and buds, sucking sap and leaving sticky honeydew behind.
How to treat it →PestMealybugs
White, cottony insects that hide in leaf joints and under leaves, weakening plants and spreading easily to neighbours.
How to treat it →PestSpider mites
Tiny sap-sucking mites that thrive in hot, dry conditions, causing speckled, dull leaves and fine webbing.
How to treat it →
