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Monk's-hood
Also known as: Wolfsbane, Auld wife's huid, Helmet flower, Garden monkshood
Monk's-hood (Aconitum napellus) is an extremely toxic plant that is native to western and central Europe. It is deadly if ingested and its toxic properties can be absorbed through the skin, so the plant must never be handled without gloves. It has a long history of being used as a poison. In mid-summer, it produces dark purple-blue flowers.
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Perennial, Annual
Lifespan
Herb
Plant Type
Summer
Bloom Time
Fall
Harvest Time
1 m
Plant Height
45 cm
Spread
Green
Leaf Color
2.5 cm to 5 cm
Flower Size
Blue, Purple, White, Pink, Violet
Flower Color
Green, Blue
Stem Color
Deciduous
Leaf type
20 - 35 ℃
Ideal Temperature

Images of Monk's-hood

Distribution of Monk's-hood

Distribution Map
Monk's-hood is primarily native to the mountainous regions of temperate zones in the Northern Hemisphere. It is well established in various parts of Europe and Asia, thriving in damp, shady areas. This species has been introduced and is now naturalized in the cooler regions of Northern Europe. Monk's-hood is also cultivated in some areas, likely for its diverse range of properties.
Native
Cultivated
Invasive
Introduced
No species reported
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Habitat
Damp shady places, moist rich meadows
Hemisphere Trend Curve

Culture

Garden Use
Despite its high toxicity, monk's-hood is cultivated in gardens for its showy, spike-like inflorescences that feature blue to purple flowers. Its decorative divided leaves can serve as a backdrop for other lower-growing flowering plants. Monk's-hood is attractive to insects and birds, however, it is toxic for mammals upon both contact and ingestion. When positioning it, make sure it is well out of reach.
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Toxicity

Monk's-hood poses severe toxicity risks to humans, cats, and dogs due to the potent toxin aconitine in all parts of the plant. Ingestion leads to acute symptoms: burning mouth, vomiting, diarrhea, neurological dysfunction, and potentially lethal heart and respiratory paralysis. Immediate veterinary care is crucial if cats or dogs ingest monk's-hood. Handle with extreme caution.
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Care Guide for Monk's-hood

Every week
Water
Partial sun
Sunlight
20 - 35 ℃
Ideal Temperature
Garden Soil
Soil Type
Water: Originating from moist European mountains, monk's-hood prefers evenly moist soil without extremes of waterlogging or drought. Weekly watering maintains hydration. Best grown outdoors, monk's-hood benefits from mulching, which helps retain moisture and stabilize temperature during its active growth period.
Fertilize: To promote optimal growth in monk's-hood, use a balanced fertilizer (10-10-10) in early spring and again in midsummer, avoiding over-fertilization. A phosphorus-rich blend can boost flowering. Consider compost for soil health and adjust feeding seasonally. Wear protective gloves when handling monk's-hood.
Pruning: Monk's-hood produces tall spires of blue flowers and requires pruning in early to late spring. Cut back old stems to soil level and perform regular deadheading to extend blooming. Pruning enhances health, prevents disease, and improves aesthetics. Use clean, sharp tools for best results.
Propagation: Monk's-hood is a perennial that propagates well through division. Carefully separate root clumps, ensuring each section has roots. Replant promptly at the original soil depth to promote healthy establishment, as monk's-hood is sensitive to disturbance.
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