Arisaema kishidae 'Jack Frost'
perennial

Jack Frost Cobra Lily

Arisaema kishidae 'Jack Frost'

The Story

Plant Bio

Arisaema kishidae is a tuberous, herbaceous perennial from Japan. It features a distinctive 'jack-in-the-pulpit' flower (spathe and spadix) that appears in spring before the leaves fully develop.

This cultivar is celebrated for its variegated, frosted-looking leaves that add ornamental appeal even when not in bloom, making it a popular choice for shaded garden areas.

Uses & Benefits:

Ornamental UsesStriking foliage and unique floral structure add visual interest in shaded gardens.
Practical UsesProvides ground cover in woodland settings, suppressing weeds.
Ecological BenefitsSupports native pollinators and beneficial insects in shaded habitats.

Essentials

At a Glance

Plant Type

Perennial

Height

12 inches

Width

8 inches

Light

Partial Sun, Shade

Zones

4, 5, 6, 7, 8, 9

Water

Moist

Humidity

Moderate

Lifespan

Perennial

Native To

Japan

Toxicity

Toxic if ingested

Bloom period

Early spring – Late spring

J
F
M
A
M
J
J
A
S
O
N
D

In flower about 3 months of the year

Planting

How to Grow

  1. Tuck bulbs 4 inches deep in well-draining soil.
  2. Water regularly to keep soil moist but not soggy.
  3. Provide partial shade for optimal growth.
  4. Mulch to retain moisture and regulate temperature.
  5. Allow bulbs to establish for 1 year before heavy watering.
  6. Divide clumps every 3-4 years in early spring.

Pro Tip

Plant in partial shade with rich, moist soil for best results.

Keep It Thriving

Care Guide

Do

  • Water consistently during growing season 🌱
  • Mulch to conserve moisture
  • Fertilize in early spring with balanced fertilizer

Don't

  • Avoid waterlogging soil ❌
  • Don’t expose bulbs to direct, harsh sunlight
  • Skip heavy fertilization in late fall

Seasonal Care Calendar

TaskJanFebMarAprMayJunJulAugSepOctNovDec
Fertilize
Mulch
Plant

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Shaded woodland borderMoist shady bed

Companion Plants

Hostas Ferns Astilbes

Multiply

Propagation Methods

Good to Know

Common Questions

Jack Frost Cobra Lily questions

What zones can Jack Frost Cobra Lily grow in?

Jack Frost 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 Jack Frost Cobra Lily deer resistant?

Yes β€” Jack Frost Cobra Lily is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Jack Frost Cobra Lily bloom?

Jack Frost Cobra Lily typically blooms in early spring through late spring. Exact timing shifts a week or two with your zone β€” Sow's bloom calendar maps it to your garden.

Does Jack Frost Cobra Lily need full sun?

Jack Frost Cobra Lily does best in part shade.

Keep exploring

Grow Jack Frost Cobra Lily with confidence

See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.