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Ranunculaceae HERB OUTDOOR Placement Primary: Other

Wolfsbane

Aconitum napellus

Identified By Marcs

Aconitum, commonly known as wolfsbane or monkshood, is a genus of over 250 species of flowering plants belonging to the buttercup family Ranunculaceae. They are native to mountainous areas of the Northern Hemisphere, producing tall spikes of striking blue, purple, white, or yellow flowers that resemble the hoods of medieval monks. While highly valued in ornamental horticulture for their dramatic vertical presence and late-season blooms, every part of the plant contains extremely potent diterpenoid alkaloids, making it one of the most famously toxic plants found in temperate gardens. Historically associated with folklore, medicine, and poisoning, it requires careful handling and deliberate placement.

Also known as: Monkshood Devil's Helmet Queen of Poisons

Toxicity & Safety

Is Wolfsbane toxic to pets?

Yes, toxic to pets.

Aconitum species are intensely toxic to all domestic pets, including dogs, cats, and horses. The plant contains deadly aconitine alkaloids that rapidly affect the nervous system and cardiac function. Ingestion of any plant part, especially the roots and seeds, can cause severe drooling, vomiting, weakness, cardiac arrhythmias, respiratory failure, and death. Immediate veterinary intervention is critical if exposure is suspected, as symptoms manifest very rapidly after ingestion and can quickly become fatal.

Is Wolfsbane toxic to humans?

Yes, toxic to humans.

Aconitum is widely recognized as one of the most lethally toxic plants known to humans. All parts of the plant, particularly the roots and tubers, contain high concentrations of aconitine and related alkaloids. Skin absorption can occur if handling damaged plant tissue without gloves. Ingestion leads to a burning sensation in the mouth, numbness, tingling, severe gastrointestinal distress, hypotension, fatal ventricular arrhythmias, and paralysis. Traditional uses in herbal medicine have been largely abandoned due to an extremely narrow margin of safety between therapeutic and lethal doses.

Is Wolfsbane safe during pregnancy?

Caution advised during pregnancy.

Due to the extreme systemic toxicity of aconitine alkaloids found throughout the Aconitum plant, exposure during pregnancy poses catastrophic risks. The potent neurotoxins and cardiotoxins can easily cross biological barriers, inducing severe maternal toxicity, systemic shock, and cardiac arrest, which directly threatens both maternal survival and fetal viability. Pregnant individuals must completely avoid handling, touching, or cultivating this plant under any circumstances to prevent accidental poisoning or absorption.

Growth & Dimensions

Height 60 - 150 cm
Width 30 - 60 cm
Growth Rate Moderate
Care Level Moderate
Lifespan Perennial

Ideal Environment

Temperature -20°C - 25°C
Sunlight Hours 4 - 8 hrs/day
Sun Exposure Partial shade
Soil pH 6 - 7.5
Watering Interval 5 - 10 days
Humidity 40.00% - 80.00%
USDA Zone 3 - 8

Temperate Mountainous Regions

Climate: Thrives in cool temperate climates with cold winters and mild, moist summers typical of alpine and subalpine zones.

Soils: Loam Clay Humus-rich
Annual Rainfall: 800 - 1500 mm

Native Regions

North America
Europe
Asia
Southern Europe
Central Europe
Western Europe

How to Care for Wolfsbane

How should I handle safe handling and pruning?

Always wear thick waterproof gloves and protective sleeves when handling or pruning Wolf's bane to prevent sap absorption through the skin.

How should I handle soil and feeding?

Plant in rich, humus-heavy, well-draining soil. Apply a balanced organic fertilizer or compost layer in early spring to support vigorous growth.

How should I handle moisture and watering management?

Aconitum prefers consistently moist, humus-rich soil that never completely dries out during the active growing season. Water deeply once a week during dry spells, ensuring the root zone stays damp but not waterlogged. Mulching around the base helps retain soil moisture and keeps the root system cool during hot summer months.

How to Propagate Wolfsbane

How to propagate Wolfsbane by seed?

Sow fresh seeds in cold frames during autumn. Germination can be slow and irregular, often requiring a period of cold stratification.

How to propagate Wolfsbane by division?

Propagating Aconitum through division should be performed with extreme caution due to the extreme toxicity of the roots. Always wear heavy-duty waterproof gloves and protective eyewear. Carefully dig up established clumps in early spring or autumn. Gently separate the tuberous roots, ensuring each section possesses at least one viable growth bud. Replant the divisions immediately at the same depth they were previously growing, and water thoroughly to settle the soil around the roots.

Common Diseases & Pests of Wolfsbane

What is Powdery Mildew and how is it treated?

Fungal
Symptoms:

White or grayish powdery spots appear on the upper and lower surfaces of leaves, stems, and flower buds. Severe infections cause leaves to curl, yellow, and drop prematurely, reducing the overall vigor and aesthetic appeal of the plant during late summer.

Treatment:

Remove severely infected foliage immediately to reduce fungal spore loads. Apply approved organic fungicides such as neem oil or sulfur-based sprays according to package directions, ensuring thorough coverage of all affected plant surfaces during dry weather.

Prevention:

Ensure adequate spacing between plants to promote good air circulation. Plant in locations with appropriate sunlight exposure and avoid overhead watering, which creates damp conditions favorable for fungal spore germination and rapid spread.

Properties & Benefits of Wolfsbane

Bears Fruit

Key Nutrients / Compounds

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