Aconitum Species, Northern Monkshood, Larkspur-leaf Monkshood

Aconitum delphinifolium

Family
Ranunculaceae (ra-nun-kew-LAY-see-ee)
Genus
Aconitum (a-kon-EYE-tum)
Species
delphinifolium (del-fin-uh-FOLE-ee-um)
Synonym
Aconitum chamissonianum
Aconitum chamissonis
Aconitum semigaleatum
Sun Exposure
Sun to Partial Shade
Light Shade
Partial to Full Shade
Full Shade
Foliage
Herbaceous
This plant is resistant to deer
Smooth
Textured
Height
under 6 in. (15 cm)
6-12 in. (15-30 cm)
12-18 in. (30-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
Spacing
15-18 in. (38-45 cm)
Hardiness
USDA Zone 3a: to -39.9 °C (-40 °F)
USDA Zone 3b: to -37.2 °C (-35 °F)
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
Danger
All parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction
Bloom Color
Pale Yellow
Dark Blue
Medium Blue
Blue-Violet
Lavender
Medium Purple
White/Near White
Bloom Time
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Other Details
Category
Perennials
Water Requirements
Foliage Color
Dark/Black
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
5.1 to 5.5 (strongly acidic)
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
Patent Information
Non-patented
Propagation Methods
By dividing the rootball
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
From seed; sow indoors before last frost
Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Unalaska, Alaska

Kennebunk, Maine

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Gardener's Notes:

0
positive
1
neutral
0
negative
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J
J
Palmyra, IL (Zone 5b) | January 2005 | neutral

Aconite poison contains an alkaloid, which paralyzes the nervous system and lowers both body temperature and blood pressure. Whalers used...Read More

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