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Allium giganteum

Ornamental Onion

Best sheltered from strong winds, it produces a basal rosette of strap-shaped, grayish-green leaves. From the centre of each rosette, a thick, leafless stem appears topped by a dense, globular, softball sized cluster of tiny, star-shaped, lilac-purple florets. This plant is not used for culinary purposes.

  • »  Huge purple balls of tiny star-shaped florets on thick, green stems
  • »  This allium is not used for culinary purposes
  • »  Produces grayish-green, strap-like leaves
  • »  Attracts bees
  • »  Bloom Time: Late spring to early summer
  • »  Flower Size: 15 cm

1gal
$29.75
  • Category:Perennials
  • Hardiness Zone:5
  • Height:125-150 cm
  • Spread:15-30 cm
  • Bloom Color: Purple
Exposure
• Full Sun
• Partial Sun/Shade
Soil Moisture
• Moist to Average
• Average to Dry Soils
• Well-drained
Attracts Wildlife
• Attracts Butterflies
Growth Rate
• Fast
• Medium
Critter
• Deer Resistant
Attributes
• Cut Flower/Foliage
• Edible
• Drought Tolerant
• Fragrant
• Heat Tolerant
• Xeriscape
Flowering Time
• Spring
• Lt. Spr-Sum
Habit
• Upright
Foliage Color
• Gray
• Green
Landscape uses
• Border/edging
• Rock garden
• Rooftop (extensive)
Planting instructions
• Container Plants
Growing & Maintenance Tips for Allium giganteum

Leaves die back as flowers begin; don't cut back foliage as it feeds the bulb for next year's flower. Once the flower is spent, remove the flower stalk and leave the foliage until it completely dies back, it can then be removed by gently pulling on the leaves. Do not over water and let the soil dry out between waterings.