Photo by Melody

PlantFiles: Aconite, Monkshood, Monk's Coule, Helmet Flower, Cat's Tail
Aconitum 'Bressingham Spire'

Family: Ranunculaceae (ra-nun-kew-LAY-see-ee) (Info)
Genus: Aconitum (a-kon-EYE-tum) (Info)
Cultivar: Bressingham Spire

Synonym:Aconitum napellus

One vendor has this plant for sale.

11 members have or want this plant for trade.


24-36 in. (60-90 cm)
36-48 in. (90-120 cm)

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

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)

Sun Exposure:
Sun to Partial Shade
Light Shade

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

Bloom Color:
Dark Blue

Bloom Time:
Late Summer/Early Fall
Mid Fall
Late Fall/Early Winter


Other details:
This plant is resistant to deer

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

Patent Information:
Unknown - Tell us

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

Click thumbnail
to view:

By Veshengo
Thumbnail #1 of Aconitum  by Veshengo

By Veshengo
Thumbnail #2 of Aconitum  by Veshengo

By Terri1948
Thumbnail #3 of Aconitum  by Terri1948


3 positives
No neutrals
No negatives

Gardeners' Notes:

Positive ifonly On Oct 30, 2007, ifonly from Brookfield, CT wrote:

Love this plant - it's been in bloom in my garden for weeks, deep blue/purple blooms against cotinus Velvet Cloak, with Hot Lips turtlehead & Becky shasta daisy. Little Lamb hydrangea, sedum Autumn Joy, and a big clump of soft gold mums nearby. It looks wonderful with all the golds of the turning leaves and dusty pinks of the fading flowers. Very tall beside the rock wall around my patio. Full sun, soil on the dry side. Four plants so far, and I want more - I'll try scattering seed once it ripens. What's better than a fall garden in bloom?

Positive Mamiesdream On Jul 27, 2007, Mamiesdream from Montpelier, VT (Zone 4b) wrote:

This provides an interesting specimen all growing season. It has deeply serrated leaves and tall spires that do not go unnoticed. In the early fall when little else is left to bloom these put on a display of beautiful purpley blue blossoms. They grow heartily in my New England cottage garden.

Positive Veshengo On Oct 19, 2006, Veshengo from Faversham
United Kingdom (Zone 8a) wrote:

Awarded the RHS AGM (Award of Garden Merit)

Bred by Alan Bloom as his nursery at Bressingham, Norfolk, UK.


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

Oakland, California
Brookfield, Connecticut
Montpelier, Vermont
Mc Lean, Virginia
Olympia, Washington

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