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Monkshood
Aconitum grossedentatum

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

Category:

Perennials

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)

Sun Exposure:

Full Sun

Sun to Partial Shade

Light Shade

Partial to Full Shade

Full Shade

Danger:

All parts of plant are poisonous if ingested

Handling plant may cause skin irritation or allergic reaction

Bloom Color:

Medium Blue

Dark Blue

Blue-Violet

Bloom Time:

Late Summer/Early Fall

Mid Fall

Late Fall/Early Winter

Foliage:

Herbaceous

Blue-Green

Smooth-Textured

Leathery-Textured

Other details:

This plant is resistant to deer

Flowers are good for cutting

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:

Unknown - Tell us

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

Regional

This plant has been said to grow in the following regions:

Royal Oak, Michigan

Gardeners' Notes:

0
positives
1
neutral
0
negatives
RatingContent
Neutral

On Sep 8, 2014, fairfaxbloomer from Fairfax, CA wrote:

Highly toxic. Be careful.