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Photo Credit: http://www.opvallendeplanten.nl/sortiment/aconitum/
Great Companions
Japanese Anemone Japanese Anemone
Anemone hupehensis var. japonica 'September Charm'
Stonecrop Stonecrop
Sedum x 'Autumn Joy (Herbstfreude)'

Aconitum carmichaelii 'Arendsii'

Monkshood

One of the tallest monkshoods, easily standing at 4’ in flower, plants bear large flowers of an intense blue in September and October on sturdy, self-supporting stems. ‘Arendsii’ is one of the best late flowering monkshoods. Makes an excellent cut flower, but care should be taken not to get any sap on open wounds.

Excellent flower height
Intense blue flowers
Great cut flower
Height: 3-4 Inches
Spread: 2 Inches
Zone: 3-7
Color: Blue Violet

Monkshood Characteristics & Attributes

Exposure
Sun
Morning Sun / Afternoon Shade
Part Shade
Soil Moisture Needs
Moist
Average
Season of Interest (Flowering)
Late Summer
Fall
Critter Resistance
Deer Resistant
Growth Rate
Medium
Attributes
Cut Flower
Accent Plant
Moist Sun
Perennial Border
Border
Homeowner Growing & Maintenance Tips for Monkshood

Aconitums should be planted in full sun but will tolerate afternoon shade. They also tolerate moist soils but should not be planted in swampy conditions. Best planted in fall. Does not transplant well once established, but tuberous roots can be used for propagation by carefully separating them from their mother plants and transplanting them in the fall.

Interesting Notes

Aconitum, or monkshood, received its common name from the appearance of its flowers which have enlarged, hood-shaped sepals that hide the rest of their floral parts. According to Armitage, roots of this plant “were used as poison bait for wolves, thus accounting for another popular common name, wolfsbane. All aconitums have poisonous roots, leaves, and stems; warnings concerning their poisonous properties have been sounded since the late 1500’s.”

The fleshy, tuberous roots are especially toxic and due to their appearance, should not be planted near tuberous food crops such as potatoes, horseradish, or Jerusalem artichokes.  With that said, Aconitum is a superb garden plant of stately beauty.