Allium sphaerocephalon

Allium sphaerocephalon

Ornamental onion

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Flowers
Flowers
Yes
Yes

Key Information

  • Botanical name: Allium sphaerocephalon
  • Common name: Ornamental onion
  • Plant type: Bulb

Height: 90cm

Spread: 8cm

Flower colour:
  • Red
Foliage colour:
  • Green
  • Features: Attractive seed-heads, Attractive to wildlife, Flowers

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Allium sphaerocephalon is a striking allium, bearing dense green drumstick-style flower heads which mature to maroon-red. It's a great choice for growing in a mixed herbaceous border among ornamental grasses, or gravel gardens. It also works well in a pot. 

For best results, plant Allium sphaerocephalon bulbs in fertile, well-drained soil up to three times their diameter. Grow in well-drained soil in full sun.

Position

  • Sun exposure: Full sun
  • Aspect: South facing, West facing
  • Position in border: Front, Middle
  • Hardiness: Hardy
  • Maintenance: Prefers rich soil
  • Soil type: Well drained/light/sandy, Clay/heavy/moist, Chalky/alkaline

Wildlife

Attracts:
  • Bees

  • Beneficial insects

  • Birds

  • Butterflies / Moths

  • Other pollinators

  • Wildlife features: Nectar/pollen rich flowers

Care routine

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Sow
Sow
Yes
Yes
Plant
Plant
Yes
Yes
Yes
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Divide
Divide
Yes
Yes
Yes
Collect seed
Collect seed
Yes
Yes

Toxicity

Toxic to:
  • People

  • Cats

  • Dogs

  • Birds

  • Horses

  • Livestock

  • Effects: Harmful if ingested

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