About
Colocasia esculenta 'Blue Hawaii' (Royal Hawaiian Series) is a frost-sensitive perennial that can reach heights of up to 1.5 meters. It features heart-shaped leaves that are bright green, accented by blue-black veins, and is supported by dark purple, upright stems. This plant excels as a houseplant but can also thrive outdoors in containers placed in a frost-free, sheltered environment.
About the genus
Colocasia comprises tuberous-rooted perennials that may be deciduous or evergreen. The leaves are typically arrow-shaped or rounded and feature noticeable veining. While the flowers are small and borne on a spadix enclosed by a compact white spathe, they are rarely seen in cultivated settings.
Growing conditions
- Sunlight
- Partial shade
- Soil type
- Loam, Sand
- 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, Houseplants
- Habit
- Clump forming
- Foliage
- Evergreen
- Height
- 1-1.5 metres
- Spread
- 0.5-1 metres
- Time to full height
- 2-5 years
- Suggested uses
- Architectural, City and courtyard gardens, Cottage and informal garden, Houseplants, Patio and container plants
- Toxicity
- Humans/Pets: Harmful if eaten, skin/eye irritant. Wear gloves and other protective equipment when handling
Care notes
- Cultivation
- Plant tubers in a large pot of humus-rich compost in warm conditions in early spring. In early summer the pot can be positioned in a sunny or lightly shaded spot outdoors, with shelter from strong winds. Water freely when the plant comes into growth and apply a high nitrogen feed weekly. Either move the pot into a greenhouse or conservatory over winter, or lift the tuber and store it dry. See houseplant cultivation for further advice
- Pruning
- No pruning required
- Propagation
- Propagate by division or by stem cuttings
- Pest resistance
- May be susceptible to glasshouse red spider mite, aphids and glasshouse whitefly
- Disease resistance
- Generally disease-free