About
Allamanda cathartica is a robust evergreen climber characterized by its whorled leaves and large, trumpet-shaped flowers that measure approximately 12 cm long. These bright yellow blooms appear in clusters at the leaf axils or at the ends of stems during the summer and autumn seasons.
About the genus
Allamanda are evergreen shrubs that may grow in a scrambling manner. They feature simple leaves, which are often arranged in whorls, and produce large trumpet-shaped flowers in terminal clusters.
Growing conditions
- Sunlight
- Full sun
- Soil type
- Loam, Sand
- Soil pH
- Acid, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- South-facing, West-facing, East-facing
- Exposure
- Sheltered
- UK hardiness
- H1B
Plant details
- Plant type
- Conservatory Greenhouse
- Habit
- Climbing
- Foliage
- Evergreen
- Height
- 8-12 metres
- Spread
- 2.5-4 metres
- Time to full height
- 10-20 years
- Suggested uses
- Patio and container plants, Sub-tropical
- Toxicity
- Harmful if eaten, skin and eye irritant. Wear gloves and other protective equipment when handling Pets (dogs, cats): Harmful if eaten, skin and eye irritant - see the HTA guide to potentially harmful plants for further information and useful contact numbers
Care notes
- Cultivation
- Grow outdoors in moist but fertile soil in full sun in frost-free location. Under glass grow in peat-free, loam-based potting compost in full sun
- Pruning
- Pruning group 11 or pruning group 12
- Propagation
- Propagate by seed or greenwood cuttings
- Pest resistance
- May be susceptible to glasshouse red spider mite and glasshouse whitefly
- Disease resistance
- Generally disease-free