perennial

Japanese Jack-in-the-Pulpit

Arisaema serratum

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

24 inches

Width

15 inches

Light

Partial Sun, Shade

Zones

4, 5, 6, 7, 8, 9

Water

Moist, well-drained

Humidity

Moderate to high

Lifespan

Perennial

Native To

Japan, Korea, China

Toxicity

Toxic if ingested; skin irritant

The Story

Plant Bio

A tuberous, herbaceous perennial native to woodlands in Japan, Korea, and China. It features one or two large leaves, each divided into 7-15+ radiating leaflets, and a distinctive flower (inflorescence) consisting of a hooded spathe and a club-like spadix. A highly variable species with spathes ranging in color from green to deep purple, often striped. After flowering, it produces a dense cluster of showy, bright red berries in late summer and fall, providing significant ornamental interest.

Bloom Period:

EarlyLate

Uses & Benefits:

Provides striking early spring blooms and exotic foliage, adding unique visual interest to shaded gardens.

Prefers shaded, moist environments, helping to manage garden moisture levels.

Supports early-season pollinators and beneficial insects in woodland habitats.

Marketplace

Where to Buy

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Planting

How to Grow

Tuck seeds or rhizomes into well-drained soil in early spring
Water regularly to keep soil moist but not waterlogged
Provide partial shade for optimal growth
Mulch around the base to retain moisture
Fertilize lightly in early spring with balanced fertilizer
Protect from late frosts with mulch or cover if necessary

Pro Tip

Plant in shaded areas with rich, moist soil for best results

Keep It Thriving

Care Guide

Do

Water consistently to keep soil moist 🌱
Apply mulch to retain moisture and suppress weeds
Divide clumps every few years to promote healthy growth
Use organic fertilizer in spring

Don't

Avoid overwatering, which can cause bulb rot ❌
Don’t expose to full sun, which can scorch leaves
Never allow soil to dry out completely
Avoid heavy, clay soils without amendment

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 garden bedEarly spring border with purple accents

Companion Plants

Hostas Ferns Astilbes Trilliums

Multiply

Propagation Methods

Good to Know

Common Questions

Japanese Jack-in-the-Pulpit questions

What zones can Japanese Jack-in-the-Pulpit grow in?

Japanese Jack-in-the-Pulpit 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 Jack-in-the-Pulpit deer resistant?

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

When does Japanese Jack-in-the-Pulpit bloom?

Japanese Jack-in-the-Pulpit typically blooms in late 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 Jack-in-the-Pulpit need full sun?

Japanese Jack-in-the-Pulpit does best in part shade.