2 named cultivars

perennial

Japanese Cobra Lily

The Story

Plant Bio

A tuberous, herbaceous perennial from the arum family, noted for its distinctive flower structure (a spathe and spadix) and its large, pedate leaf which typically has 7-15 leaflets. The plant emerges in spring, with the flower often appearing before the leaf fully unfurls.

Distinguished by its dramatic, very dark purple to nearly black spathe (pitcher), often with contrasting white stripes on the interior. The foliage can also emerge with a dark purple flush, adding to its ornamental appeal.

Uses & Benefits:

Adds exotic, architectural interest to shaded gardens with its striking floral form.

Provides ground cover in low-light areas, suppressing weeds.

Supports shade-loving pollinators and enhances woodland biodiversity.

Essentials

At a Glance

Plant Type

Perennial

Height

24 inches

Width

12 inches

Light

Partial Sun, Shade

Zones

4, 5, 6, 7, 8, 9

Water

Moderate

Humidity

High

Lifespan

Perennial

Native To

East Asia

Toxicity

Toxic if ingested

Planting

How to Grow

Tuck rhizomes 2 inches deep in well-drained soil.
Mist cuttings regularly to maintain humidity.
Plant in shaded area with rich organic matter.
Water consistently to keep soil moist but not waterlogged.
Mulch to retain moisture and regulate soil temperature.
Divide clumps every 3-4 years in early spring.

Pro Tip

Ensure soil remains moist and well-drained for best growth.

Keep It Thriving

Care Guide

Do

Water regularly to keep soil moist 🌱
Apply organic compost annually
Mulch to conserve moisture

Don't

Avoid overwatering to prevent rot ❌
Do not expose to direct harsh sunlight
Avoid disturbing rhizomes during dormancy

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Fertilize
Mulch
Plant
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Shaded woodland borderMystical shade garden

Companion Plants

Hostas Ferns Anemones

Multiply

Propagation Methods

Good to Know

Common Questions

Japanese Cobra Lily questions

What zones can Japanese Cobra Lily grow in?

Japanese Cobra Lily is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Japanese Cobra Lily deer resistant?

Yes — Japanese Cobra Lily is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Japanese Cobra Lily bloom?

Japanese Cobra Lily typically blooms in early spring through mid-spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Japanese Cobra Lily need full sun?

Japanese Cobra Lily does best in part shade.