The Story
Plant Bio
A tuberous perennial from the Himalayas, typically producing a single, large leaf composed of three leaflets with deeply impressed veins. It is grown for its dramatic inflorescence (spathe and spadix).
The spathe is a deep chocolate-purple with thin white stripes, wrapping around the spadix which has a long, thread-like appendage extending from the tip.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Perennial
Height
15 inches
Width
12 inches
Light
Partial Sun, Shade
Zones
6, 7, 8, 9
Water
Medium
Humidity
Moderate
Lifespan
Perennial
Native To
Himalayas
Toxicity
All parts contain calcium oxalate crystals and are toxic if ingested
Planting
How to Grow
- Tuck corms 4-6 inches deep in well-draining soil.
- Water regularly to keep soil moist but not waterlogged.
- Mist foliage during dry spells for optimal growth.
- Provide partial shade to protect from harsh afternoon sun.
- Mulch around plants to retain moisture and suppress weeds.
- Divide clumps every 3-4 years in early spring for propagation.
Pro Tip
Ensure soil is rich in organic matter for healthy foliage and flowers.
Keep It Thriving
Care Guide
Do
- Plant in well-draining soil 🌱
- Keep soil moist during active growth
- Provide partial shade for protection
Don't
- Avoid waterlogging, which can cause root rot ❌
- Don’t expose to full, harsh sunlight
- Refrain from disturbing tubers during dormancy
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
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Ribbed Cobra Lily questions
What zones can Ribbed Cobra Lily grow in?
Ribbed Cobra Lily 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 Ribbed Cobra Lily deer resistant?
Yes — Ribbed Cobra Lily is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Ribbed Cobra Lily bloom?
Ribbed Cobra Lily typically blooms in late spring to early summer through mid-spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Ribbed Cobra Lily need full sun?
Ribbed Cobra Lily does best in part shade.
More Arisaema to compare
Japanese Cobra Lily
Arisaema ovale
Jack-in-the-pulpit
Arisaema triphyllum
Himalayan Cobra Lily
Arisaema consanguineum
Arisaema engleri Green Spathe Form
Arisaema engleri 'Green Spathe Form'
Nebraska Green Dragon
Arisaema dracontium 'Nebraska'
Japanese Jack-in-the-Pulpit
Arisaema serratum
Keep exploring
Explore the genus
Hardy in your zone?
Grow Ribbed 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.