The Story
Plant Bio
Arisaema speciosum, commonly known as Himalayan Giant, is recognized for its striking appearance and large, umbrella-like leaves.
This cultivar is notable for its large size and unique inflorescence, making it a standout in shaded gardens.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Perennial
Height
30 inches
Width
15 inches
Light
Partial Sun, Shade
Zones
6, 7, 8, 9
Water
Moderate
Humidity
High
Lifespan
Perennial
Native To
Himalayas
Toxicity
All parts contain calcium oxalate crystals and are poisonous if ingested.
Bloom period
Late spring – Early summer
In flower about 2 months of the year
Planting
How to Grow
- Tuck corms 4-6 inches deep in well-draining soil in early spring.
- Mist seedlings regularly to maintain humidity and promote germination.
- Water consistently during growing season, avoiding waterlogging.
- Provide partial shade to protect from harsh sun.
- Fertilize with balanced organic fertilizer in spring and midsummer.
- Mulch around plants to retain moisture and suppress weeds.
Pro Tip
Plant corms in a sheltered spot with dappled shade for best growth.
Keep It Thriving
Care Guide
Do
- Water regularly during active growth 🌱
- Apply organic mulch to conserve moisture
- Fertilize in spring and summer
Don't
- Avoid overwatering to prevent rot ❌
- Don’t expose to full direct sun in hot climates ❌
- Do not disturb corms during dormancy
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Fertilize | ||||||||||||
| Mulch | ||||||||||||
| Plant |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Multiply
Propagation Methods
Good to Know
Common Questions
Himalayan Giant Jack-in-the-Pulpit questions
What zones can Himalayan Giant Jack-in-the-Pulpit grow in?
Himalayan Giant 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 Himalayan Giant Jack-in-the-Pulpit deer resistant?
Yes — Himalayan Giant Jack-in-the-Pulpit is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Himalayan Giant Jack-in-the-Pulpit bloom?
Himalayan Giant Jack-in-the-Pulpit typically blooms in late spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Himalayan Giant Jack-in-the-Pulpit need full sun?
Himalayan Giant Jack-in-the-Pulpit 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
Nebraska Green Dragon
Arisaema dracontium 'Nebraska'
Arisaema engleri Green Spathe Form
Arisaema engleri 'Green Spathe Form'
Mt Fuji Form Japanese Cobra Lily
Arisaema serratum 'Mt Fuji Form'
Keep exploring
Explore the genus
Hardy in your zone?
Grow Himalayan Giant Jack-in-the-Pulpit 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.