Aconitum Species, Northern Monkshood
Aconitumseptentrionale

Synonym:Aconitum excelsum

Synonym:Aconitum szeewaldianum

Synonym:Lycoctonum excelsum

Category
Perennials

Water Requirements

Sun Exposure
Sun to Partial Shade
Light Shade

Foliage
Herbaceous
This plant is resistant to deer
Smooth
Textured

Foliage Color

Height
4-6 ft. (1.2-1.8 m)

Spacing
9-12 in. (22-30 cm)

Hardiness
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)

Where to Grow

Danger
All parts of plant are poisonous if ingested
Pollen may cause allergic reaction

Bloom Color
Lavender

Bloom Characteristics

Bloom Size

Bloom Time
Mid Summer
Late Summer/Early Fall
Mid Fall

Other details

Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information
Non-patented

Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow outdoors in fall
Direct sow as soon as the ground can be worked
From seed; direct sow after last frost

Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Allow seedheads to dry on plants; remove and collect seeds
Seed does not store well; sow as soon as possible