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© Deeproot Plant Base
poisonous or irritant
full sun, part shade
preferred soil pH: any
minimum temp: -35°C
USDA zone: 4 to 9
Spectacular large pleated leaves. Tall branching spikes of small densely packed maroon-black flowers, which are unpleasantly scented. They are followed by attractive seed heads.
Needs a rich fairly moist soil and prefers some shade. Resents disturbance once established, but long lived.
Can be badly attacked by slugs and snails.
From seed or by division in autumn or early spring.
Shady borders, woodland and wild gardens.