About
Arisaema sikokianum is a tuberous perennial that reaches a height of approximately 40 cm. It features dark green, divided foliage. In the spring, it produces flowers characterized by a large, dark purple spathe measuring up to 20 cm in length, which encases a club-shaped spadix with a white interior.
About the genus
Arisaema consists primarily of tuberous perennials characterized by palmately lobed foliage. They feature unique tubular, hooded spathes that enclose small true flowers clustered at the base of a club-shaped or filamentous spadix. After flowering, these plants produce a spike bearing red berries.
Growing conditions
- Sunlight
- Partial shade
- Soil type
- Loam, Sand
- Soil pH
- Acid, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- East-facing, North-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H3
Plant details
- Plant type
- Bulbs
- Habit
- Columnar upright
- Foliage
- Deciduous
- Height
- 0.1-0.5 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 5-10 years
- Suggested uses
- Cottage and informal garden
- Native to
- Japan
- Toxicity
- Humans/Pets: Harmful if eaten, skin/eye irritant. Wear gloves and other protective equipment when handling For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Care notes
- Cultivation
- Grow in moist but well-drained, humus-rich soil in a cool site. In colder regions may need winter protection but tubers must not dry out when dormant
- Pruning
- No pruning required
- Propagation
- Propagate by seed sown in containers in a cold frame in autumn or spring. Offsets may be removed in late summer
- Pest resistance
- May be susceptible to slugs and vine weevil
- Disease resistance
- Generally disease-free