Species

Arisaema franchetianumFranchet's Cobra Lily

perennial

Franchet's Jack-in-the-Pulpit

The Story

Plant Bio

Arisaema franchetianum, or Franchet's Cobra Lily, is a tuberous perennial noted for its single, large, trifoliolate leaf and a dramatic hooded flower (spathe). The spathe is typically deep purple-brown with white stripes.

Cultivar Hugo is distinguished by its particularly vibrant and contrasting coloration, along with robust growth habit and increased resilience to varying soil conditions.

Uses & Benefits:

Adds exotic charm with unique foliage and flowers, perfect for shady borders and woodland gardens.

Provides ground cover in moist, shaded areas, suppressing weeds.

Supports local pollinators attracted to its flowers and foliage.

SpeciesArisaema franchetianumFranchet's Cobra Lily

Essentials

At a Glance

Plant Type

Perennial

Height

12"

Width

Light

Partial Sun, Shade

Zones

6, 7, 8, 9

Water

Consistent moisture, avoid waterlogging

Humidity

Prefers moist, humid environments

Lifespan

Perennial

Native To

East Asia

Toxicity

Toxic to humans and pets if ingested

Bloom period

Late spring – Late fall

In flower about 7 months of the year

Planting

How to Grow

Tuck tubers in well-draining soil in early spring
Water consistently to keep soil moist but not soggy
Place in partial shade for best foliage development
Mulch around base to retain moisture and suppress weeds
Fertilize lightly in early spring with balanced fertilizer
Monitor for pests and remove any affected leaves

Pro Tip

Plant in partial shade with rich, moist soil for optimal growth

Keep It Thriving

Care Guide

Do

Water regularly to keep soil moist 🌱
Mulch to retain moisture and regulate temperature
Fertilize lightly in early spring

Don't

Avoid overwatering to prevent tuber rot ❌
Do not expose to direct, harsh sunlight
Refrain from heavy fertilization

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

Shady woodland borderMoist shady garden bed

Companion Plants

Hosta Astilbe Ligularia Athyrium niponicum

Multiply

Propagation Methods

Good to Know

Common Questions

Franchet's Jack-in-the-Pulpit questions

What zones can Franchet's Jack-in-the-Pulpit grow in?

Franchet's Jack-in-the-Pulpit is hardy in USDA Zones 6–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Franchet's Jack-in-the-Pulpit deer resistant?

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

When does Franchet's Jack-in-the-Pulpit bloom?

Franchet's Jack-in-the-Pulpit typically blooms in late spring through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Franchet's Jack-in-the-Pulpit need full sun?

Franchet's Jack-in-the-Pulpit does best in part shade.