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)