Monkshood
Aconitum napellus
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Perennial
Height
48 inches
Width
18 inches
Light
Partial Sun, Shade
Zones
4, 5, 6, 7, 8
Water
Medium to wet
Humidity
Average
Lifespan
Perennial
Native To
Western and Central Europe
Toxicity
All parts are highly toxic if ingested; can cause skin irritation
The Story
Plant Bio
Aconitum napellus, commonly known as monkshood, is a tall, clump-forming perennial with deeply lobed, palmately divided leaves and striking, hood-shaped spikes of vibrant blue to violet flowers that bloom in late summer. This species is renowned for its striking flower form and intense coloration, although it is highly toxic if ingested or handled improperly.
Uses & Benefits:
Marketplace
Where to Buy
We couldn't find this plant listed online right now.
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Tuck seeds into well-draining soil in early spring.
- Keep soil moist but not waterlogged during germination.
- Provide partial shade for best growth and flower production.
- Mulch around the base to retain moisture and suppress weeds.
- Transplant seedlings after the danger of frost has passed.
- Stake tall plants to prevent wind damage.
Pro Tip
Ensure soil is rich in organic matter and well-draining for healthy growth.
Keep It Thriving
Care Guide
Do
- Water regularly during dry spells 🌱
- Provide partial shade in hot climates
- Apply compost in early spring
- Support tall flowering stems
Don't
- Avoid overwatering to prevent root rot ❌
- Do not expose to full, harsh sunlight
- Never handle without gloves due to toxicity
- Refrain from fertilizing in late fall
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Divide | ||||||||||||
| Plant | ||||||||||||
| Stake |
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
Monkshood questions
What zones can Monkshood grow in?
Monkshood is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Monkshood deer resistant?
Not reliably. Deer may browse Monkshood, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Monkshood bloom?
Monkshood typically blooms in mid to late summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Monkshood need full sun?
Monkshood does best in part shade.
More Aconitum to compare
Keep exploring
Explore the genus
Collections featuring this plant
Hardy in your zone?
Grow Monkshood 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.
