Aconitum napellus, or Monkshood, is a highly toxic herbaceous perennial. It has striking deep blue-purple, helmet-shaped flowers in summer, thriving in partial shade and
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Sunlight
Prefers partial shade; tolerates full sun in cooler climates.
Watering
Keep soil consistently moist but not waterlogged.
Soil
Rich, humus-rich, well-drained, slightly acidic to neutral
Temperature
Thrives in cool to moderate temperatures, hardy in zones 3-7.
Habitat
Outdoor
Fertilizer
Light feeding with balanced fertilizer in spring or compost annually.
Prefers partial shade; tolerates full sun in cooler climates.
Keep soil consistently moist but not waterlogged.
Rich, humus-rich, well-drained, slightly acidic to neutral
Thrives in cool to moderate temperatures, hardy in zones 3-7.
Outdoor
Light feeding with balanced fertilizer in spring or compost annually.
Plant Type
Herb
Plant Category
Ornamental
Plant Place Type
Ground, Garden
Plant Environment
Outdoor
Lifespan
Perennials
Plant Height
0.6-1.5 m
Spread
0.3-0.6 m
Growth Rate
Medium
Dormancy
Winter
Leaf Color
Dark green
Leaf Type
Palmate
Flower Size
2-4 cm
Optimal Sunlight Lux
1500
Toxic for humans
Yes
Rating: 10/5
Toxic for pets
Yes
Rating: 10/5
Edible
No
All parts of Aconitum napellus are highly toxic, containing potent neurotoxins, primarily aconitine. Ingestion can be fatal to humans and animals, causing cardiac and respiratory paralysis. Skin contact can also cause numbness and tingling.
