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English Monkshood

bare-root plants
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Aconitum napellus

36-40" tall.

Also called Friar’s Cap. Produces a mass of mid- to late-summer blooms with dense showy spikes of dark violet-blue hood-shaped flowers above elegant palmate foliage in late summer. Grand delphinium-style blooms rarely need staking. Forms large clumps in short order. An excellent cutflower—cut when ⅓ to ½ the spike is in bloom. I love watching bumblebees disappear under the hood then clamber out covered in pollen.

The entire plant is poisonous; wear gloves and wash your hands after handling or cutting. Prefers partial shade. Plant 15-20" apart in moist soil. Native to Europe. Z3. (bare-root crowns)
ships in spring
Quick Details
Lifecycle
perennial
Pollinator Friendly
Yes
Bloom Color
dark violet-blue
Hardy to Zone
3
Additional Information

Herbaceous Perennial Plants

When you receive your order, open the bags and check the stock immediately. Roots and crowns should be firm and pliable. Surface mold is harmless and will not affect the plant’s future performance. Store plants in their packaging in a cool (35–40°) location until you are ready to plant. If it’s going to be awhile, you can pot up your perennials.

Do not plant bare-root perennial plant crowns directly outdoors before danger of frost has passed. Wet and/or cold conditions for an extended period may cause rotting.

For more info:
About planting bare-root perennials

Shipping

Items from our perennial plants warehouse ordered on or before February 20 will ship from March through early May, starting with warmer areas and finishing in colder areas.

Orders placed after February 20 will ship from April to May.