perennial

Japanese Cobra Lily

Arisaema minamitanii

The Story

Plant Bio

Arisaema minamitanii is a perennial herbaceous plant with distinctive, umbrella-like foliage and striking, spathe-like flowers that display a unique combination of green and purple hues, often accompanied by a spadix.

This species is notable for its rare, localized distribution and its ability to adapt to shaded, woodland environments, making it a prized specimen for collectors of unusual aroids.

Uses & Benefits:

Adds exotic foliage and striking blooms to shaded gardens.

Prefers moist, well-drained soils, reducing the need for frequent watering.

Provides habitat and nectar for native pollinators and birds.

Essentials

At a Glance

Plant Type

Perennial

Height

12 inches

Width

8 inches

Light

Partial Sun, Shade

Zones

4, 5, 6, 7, 8

Water

Moist

Humidity

High

Lifespan

Perennial

Native To

Japan

Toxicity

Toxic if ingested

Bloom period

Early spring – Late spring

In flower about 3 months of the year

Planting

How to Grow

Tuck rhizomes 2 inches deep in shaded area
Water regularly to keep soil moist, especially in dry periods
Apply balanced fertilizer in early spring
Mulch to retain moisture and suppress weeds
Divide plants every 3-4 years in early spring
Protect from frost with mulch in winter

Pro Tip

Plant in well-drained, organically rich soil in shaded spots for best results.

Keep It Thriving

Care Guide

Do

Water consistently to keep soil moist 🌱
Mulch around the base to conserve moisture
Fertilize in spring with a balanced fertilizer
Divide in early spring to propagate

Don't

Avoid overwatering to prevent root rot ❌
Do not expose to direct, harsh sunlight
Don't forget to mulch in winter to protect roots

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Mulch
Pest Check
Plant

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Shaded woodland borderMoist shady garden bed

Companion Plants

HostaFerns AstilbeJapanese forest grass Ligularia

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 4–8. 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 late 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.