• Monkshood (Aconitum napellus) displaying tall spikes of deep blue-violet, helmet-shaped flowers above deeply divided dark green foliage in a perennial garden.
  • Monkshood (Aconitum napellus) displaying tall spikes of deep blue-violet, helmet-shaped flowers above deeply divided dark green foliage in a perennial garden.
  • Monkshood (Aconitum napellus) displaying tall spikes of deep blue-violet, helmet-shaped flowers above deeply divided dark green foliage in a perennial garden.
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Eden Valley Seeds

Monkshood Aconite Seeds – Aconitum napellus Blue Purple Perennial Flower

Monkshood Aconite Seeds – Aconitum napellus Blue Purple Perennial Flower

$16.99 USD
$16.99 USD
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Key Features

  • Plant Variety: Common Monkshood, also known as Wolfsbane or Monk’s Hood.

  • Flower Color: Typically produces striking violet-blue to deep blue flowers.

  • Plant Characteristics: Upright herbaceous perennial with deeply divided, dark green leaves and tall flower spikes.

  • Garden Uses: Suitable for cottage gardens, shaded borders, and cool-climate perennial gardens.

  • Distinctive Appearance: Helmet-shaped flowers create an elegant, architectural display in late summer.

Important safety warning: All parts of Aconitum napellus, including the seeds, are highly poisonous. Handle only with protective gloves, and keep seeds and plants away from children and pets.

Growing Benefits

  • Adds dramatic blue-violet flowers to traditional cottage garden borders.

  • Provides vertical interest with tall, upright flowering stems.

  • Brings late-season color to suitable cool-climate gardens.

  • Complements shade-loving perennials in moisture-retentive planting areas.

  • Offers distinctive ornamental flowers for experienced gardeners.

Seed Specifications

  • Common Name & Botanical Name: Monkshood, Common Aconite, Wolfsbane — Aconitum napellus.

  • Plant Type, Colors & Height: Herbaceous perennial with dark green foliage and violet-blue to deep blue flowers; typically reaches around three to five feet tall.

  • Sunlight, Soil & Water: Partial shade; fertile, humus-rich, moisture-retentive, well-drained soil; regular watering to maintain even moisture.

  • Germination, Sowing & Spacing: Germination is variable and may require cold stratification; sow shallowly and allow approximately two to three feet between established plants.

  • Growing Zones, Flowering & Uses: Commonly grown in USDA zones three through eight; flowers in summer to early autumn; used in ornamental borders and cottage gardens.

Growing Tips

  • Wear protective gloves when handling seeds or any part of the plant.

  • Provide cool conditions and follow appropriate cold-stratification instructions before sowing.

  • Keep the soil evenly moist but never waterlogged.

  • Choose a permanent location away from children, pets, and edible crops.

Seed Storage

Store seeds in a clearly labeled, sealed packet in a cool, dry location away from sunlight and moisture. Keep them securely out of reach of children and pets. Monkshood seeds may lose viability during storage, so follow the supplier’s guidance and avoid unnecessary long-term storage.

Unique Facts About Monkshood Seeds

  • Helmet-shaped flowers: The upper part of each flower forms a distinctive hood resembling a monk’s cowl.

  • Cold can encourage germination: Seeds often benefit from cold stratification, and germination may be slow or irregular.

  • Cool-climate perennial: Monkshood naturally suits temperate environments and generally performs best in cool, moist growing conditions.

  • Highly poisonous plant: The seeds, foliage, stems, and roots contain toxic alkaloids that can cause severe poisoning.

Growing Instructions

Planting Season

Sow fresh seeds in autumn where natural winter chilling is suitable, or start them in trays using a controlled stratification method. In warm climates, successful cultivation may be challenging because the plant prefers cool growing conditions.

Sowing and Seed Depth

Fill a clean seed tray with a moist, well-draining seed-starting mix. Sow seeds on the surface or cover them with a very thin layer of growing medium. Label the tray clearly and keep it away from children and pets.

Seed Spacing

Allow enough room for seedlings to develop without overcrowding. Once seedlings are established and large enough to handle, move them into individual pots. Space mature plants approximately two to three feet apart, depending on the variety and intended garden design.

Sunlight and Soil

Choose a partially shaded location with fertile, humus-rich soil. The soil should remain moist while allowing excess water to drain. In cooler regions, plants may tolerate more sunlight if their roots stay consistently moist.

Watering and Germination

Keep the growing medium consistently moist, avoiding both drought and waterlogging. Germination can be unpredictable and may take several months. Seeds often require cold stratification, and some may need alternating warm and cold conditions. Follow the supplier’s specific germination instructions where available.

Transplanting

Transplant seedlings carefully once they are sufficiently developed. Wear protective gloves and avoid direct contact with plant sap. Move them to their final location during suitable weather, minimizing root disturbance.

Fertilizing and Plant Care

Improve the soil with mature compost before planting. Apply a balanced fertilizer sparingly during active growth if necessary. Maintain soil moisture, use mulch to help keep roots cool, and support tall stems if they become unstable. Wear gloves when pruning or handling plant debris.

Flowering and Maturity

Established plants typically produce tall spikes of blue-violet, hood-shaped flowers in summer or early autumn. Seed-grown plants may take several growing seasons to flower, depending on growing conditions. Cut back dead stems carefully after flowering and dispose of plant material safely.

Safety Reminder: Monkshood is highly poisonous. Never ingest any part of the plant, and do not grow it where children or pets could access the seeds or foliage.