Arisaema kiushianum Tubers

Arisaema kiushianum is a rare and unusual woodland perennial from Japan, prized for its distinctive cobra-like flower structure and compact growth.

This intriguing species produces a striking striped spathe above finely divided foliage, making it a fascinating addition to shaded gardens.

• Height: around 20cm
• Spread: 20–30cm
• Flower colour: purple-brown with pale striping
• Flowering time: spring
• Position: partial shade to shade
• Soil: moist, humus-rich, well-drained soil

About Arisaema kiushianum

Arisaema kiushianum grows from small underground tubers and produces a compact plant with elegant foliage.

The tubers are naturally small, typically around 2cm in diameter when fully grown.

In spring, the plant produces its characteristic cobra lily flower.

• A hooded spathe with distinctive striping
• A slender spadix emerging from the centre

The unusual flower shape and colouring give the plant a strong architectural appearance despite its compact size.

This species is considered rare in cultivation and is particularly valued by collectors of woodland plants.

Benefits for UK Wildlife

Arisaema kiushianum contributes to biodiversity in shaded gardens.

• Provides shelter for insects in woodland planting
• Adds diversity to shade garden habitats
• Works well with other woodland perennials

Plant alongside ferns, trilliums, and hostas to create a layered woodland environment.

Where to Grow Arisaema kiushianum

• Woodland gardens
• Shaded borders
• Under trees and shrubs
• Naturalistic shade planting
• Collectors’ plant gardens

The compact size makes it suitable for smaller garden spaces and shaded containers.

Planting Tips

• Plant tubers in spring.
• Choose a partially shaded or shaded position.
• Use humus-rich soil improved with leaf mould.
• Plant tubers about 5–8cm deep.
• Keep soil moist during the growing season.

Apply a mulch each year to maintain moisture and recreate woodland soil conditions.

Why Grow Arisaema kiushianum

• Rare Japanese woodland species
• Distinctive cobra-like flowers
• Compact size suitable for smaller spaces
• Excellent plant for collectors
• Ideal for woodland gardens

If you enjoy unusual woodland plants, Arisaema kiushianum offers distinctive flowers and compact growth for shaded garden planting.