About
Allamanda cathartica 'Hendersonii' is a vigorous tropical evergreen vine characterized by clusters of 3-4 glossy, lanceolate leaves. During the summer and autumn months, it produces large golden yellow blooms, each measuring up to 13 cm in diameter, which emerge from bronze-hued buds. This plant thrives best in a spacious container within a conservatory setting.
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
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- East-facing, South-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H1B
Plant details
- Plant type
- Conservatory Greenhouse, Climber Wall Shrub
- Habit
- Climbing
- Foliage
- Evergreen
- Height
- 4-8 metres
- Spread
- 4-8 metres
- Time to full height
- 5-10 years
- Suggested uses
- 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
- Under glass, grow in peat-free, loam-based compost in full light. Water freely in growth, applying a balanced liquid fertiliser every 2-3 weeks. Water sparingly in winter. Provide support for the climbing stems
- Pruning
- Pruning group 11 or 12 in late winter or early spring
- Propagation
- Propagate by seed sown at 18°C in spring, or by softwood cuttings
- Pest resistance
- May be susceptible to glasshouse red spider mite and glasshouse whitefly
- Disease resistance
- Generally disease-free