Monkshood
Aconitumgrossedentatum

Family: Ranunculaceae (ra-nun-kew-LAY-see-ee)
Genus: Aconitum (a-kon-EYE-tum)
Species: grossedentatum (gros-den-TAY-tum)

Category

Perennials

Water Requirements

Unknown

Sun Exposure

Full Sun
Sun to Partial Shade
Light Shade
Partial to Full Shade
Full Shade

Foliage

Herbaceous
This plant is resistant to deer
Smooth
Unknown

Foliage Color

Blue-Green

Height

4-6 ft. (1.2-1.8 m)
6-8 ft. (1.8-2.4 m)

Spacing

12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)

Hardiness

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)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
USDA Zone 11: above 4.5 °C (40 °F)

Where to Grow

Unknown

Danger

All parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction

Bloom Color

Dark Blue
Medium Blue
Blue-Violet

Bloom Characteristics

Flowers are good for cutting

Bloom Size

Unknown

Bloom Time

Late Summer/Early Fall
Mid Fall
Late Fall/Early Winter

Other details

Unknown

Soil pH requirements

6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)

Patent Information

Non-patented

Propagation Methods

By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
Direct sow as soon as the ground can be worked
From seed; direct sow after last frost

Seed Collecting

Bag seedheads to capture ripening seed
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