Monkshood (Aconitum volubile) is a climbing perennial vine native to the grassy slopes and forests of eastern Asia to western China, bringing an exotic sophistication to cool-climate gardens. Growing 24 to 48 inches tall and spreading 18 to 24 inches wide, this tuberous-rooted twiner produces deeply divided foliage and bluish-purple, helmet-shaped flowers in late summer that reward patience with distinctive beauty. Hardy in zones 3 through 7, it thrives in moist, organically rich soil with moderate water and moderate maintenance, flourishing in cool nights below 70 degrees Fahrenheit. The upper sepal of each flower forms a large, hood-like structure that inspired its common name, evoking the headgear of medieval monks. Important: all parts of this plant are poisonous, so gloves are essential when handling.
Partial Sun
Moderate
3-7
48in H x 24in W
—
High
Hover over chart points for details
This Asian climbing monkshood stands out for its twining stems and deeply divided foliage, which create an ornamental frame even before flowering. The bluish-purple flowers arrive in late summer in terminal clusters, their distinctive helmet shape setting them apart from common garden perennials. Unlike many tall-growing herbaceous plants, this variety naturally climbs rather than standing rigidly upright, offering vertical interest without the stiffness of traditional delphiniums. Its tolerance for deer and rabbits, combined with resistance to major insect and disease problems, makes it a reliable choice for gardens where browse pressure is a concern. Gardeners in cooler regions will find it particularly rewarding, as it performs best where summer nights stay below 70 degrees.
Monkshood serves as a late-season ornamental climber, valued for its architectural flower form and ability to add vertical structure to cool-climate gardens. The twining growth habit makes it suitable for trellising, arbors, or fences where it can weave through support structures naturally. Its showy late-summer blooms and deer resistance position it as a focal point in mixed borders or cottage gardens where browse-resistant plants are needed. However, its extreme toxicity limits any practical or culinary applications; it functions purely as a decorative specimen requiring careful placement away from children and pets.
No timeline data available yet for this variety.
Sow seed in a cold frame as soon as it is ripe. This species germinates more readily from seed than other monkshood species.
Cut back stems after flowering to encourage an additional late-season bloom. Train the twining growth onto sturdy supports, guiding stems as they develop to create the desired form on trellises or arbors. Taller stems may need physical support, particularly in windy locations, to prevent damage or tangling.
Enter your ZIP code to see a personalized growing calendar for this plant.
“Aconitum volubile belongs to a genus of roughly 100 species distributed across the Northern Hemisphere, with roots in traditional medicine and folklore stretching back centuries. The genus name derives from the Latin akoniton, used by ancient Greeks for these famously toxic herbs. Historically, aconite was extracted primarily from the related A. napellus and prescribed as a cardiac and respiratory sedative, though such uses are now recognized as dangerous. This specific climbing species originated in the mountainous and forested regions of eastern Asia to western China, where it evolved to colonize grassy slopes and forest margins by twining through native vegetation. Its journey to Western gardens reflects the broader Victorian obsession with exotic hardy perennials and the horticultural exploration of Asian flora.”