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Acanthus mollis
Acanthus mollis
Acanthus mollis
  • Acanthus mollis
  • Acanthus mollis
  • Acanthus mollis
Acanthus
Garden Plants
Perennials

Acanthus mollis

Acanthus mollis, is the most common acanthus seen around the UK, but is undeniable impressive with its large glossy leaves and showy flower spikes in the summer. It was extremely popular with Victorian gardeners, believed to have been introduced as early as the 13th century, but more commonly agreed to have been introduced in the 16th century, most likely from Italy. However its spread is far, native to southern Europe, and parts of Africa/Asia. Acanthus derives from the Greek word akantha, which means thorn or prickle; mollis (moll’-liss) which means soft, so while its appearance can be quite daunting the only spiky part of this plant is the bract under each flower that has several firm points (most likely being the root of its common name), though some species of acanthus can be prickly.

  • Botanical Name: Acanthus mollis
  • Common Name: Bear’s Breeches
  • Flower Colour: White with purple bracts
  • Foliage Colour: Deep green
  • Established Height: 100-150 cm
  • Established Spread: 90-120 cm
  • Life Cycle: Perennial
  • Sunlight: Full sun to partial shade
  • Position: Borders, architectural planting, woodland gardens
  • Soil Acidity: Neutral to slightly alkaline
  • Soil Type: Moist, well-drained soil
  • Toxicity: Non-toxic

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Acanthus mollis

Acanthus mollis, commonly known as Bear’s Breeches, is a striking perennial celebrated for its dramatic, deeply lobed green leaves and tall, architectural flower spikes. In summer, the plant produces upright spikes of white flowers, each adorned with purple bracts, creating a bold and elegant display. Growing to a height of 100–150 cm with a spread of 90–120 cm, it forms large clumps that provide strong structure and texture in garden designs. Acanthus mollis thrives in full sun to partial shade and prefers moist, well-drained soil, making it well suited to borders, woodland gardens, or architectural planting schemes. Its large, glossy foliage remains attractive throughout the growing season, providing year-round interest even when the flowers fade. Non-toxic and hardy, this perennial is a low-maintenance option for gardeners seeking to add classical form, bold texture, and architectural appeal to their garden spaces.

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