Arisaema sikokianum
Japanese cobra lily
A tuberous perennial, to about 40cm, with dark green, divided leaves. The flowers appear in spring and consist of a large, dark purple spathe, up to 20cm long, with a brilliant white interior housing the club-like spadix.
_10498.jpg)
Size
Ultimate height
0.1–0.5 metresTime to ultimate height
5–10 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Moisture
Moist but well–drainedpH
Acid, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Purple White | Green | ||
|---|---|---|---|---|
| Summer | Green | |||
| Autumn | ||||
| Winter |
Position
- Partial shade
Aspect
East–facing or North–facing or West–facing
Exposure
Sheltered Hardiness
H3Botanical details
- Family
- Araceae
- Native to GB / Ireland
- No
- Foliage
- Deciduous
- Habit
- Columnar upright
- Potentially harmful
- 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
- Genus
Arisaema are mostly tuberous perennials usually with palmately lobed leaves, and distinctive tubular, hooded spathes within which the tiny true flowers are clustered at the base of the club-like or filamentous spadix, followed by a spike of red berries
- Name status
Correct
- Plant range
- Japan
How to grow
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
Propagation
Propagate by seed sown in containers in a cold frame in autumn or spring. Offsets may be removed in late summer
Suggested planting locations and garden types
- Cottage and informal garden
- Flower borders and beds
- Underplanting of roses and shrubs
Pruning
No pruning required
Pests
May be susceptible to slugs and vine weevil
Diseases
Generally disease-free
Get involved
The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.