General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun
Water Preferences: Mesic
Dry Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Slightly alkaline (7.4 – 7.8)
Minimum cold hardiness: Zone 3 -40 °C (-40 °F) to -37.2 °C (-35)
Maximum recommended zone: Zone 9b
Plant Height: 1.6 - 2 Feet
Plant Spread: 8 Inches
Flowers: Showy
Flower Color: Blue
Bloom Size: 6"-12"
Flower Time: Summer
Inflorescence Height: 6-8 Inches
Underground structures: Bulb
Uses: Will Naturalize
Dynamic Accumulator: K (Potassium)
Ca (Calcium)
Na (Sodium)
Wildlife Attractant: Bees
Pollinators: Birds
Various insects
Containers: Needs excellent drainage in pots

Common names
  • Giant Onion
  • Ornamental Onion
  • Giant Allium

This plant is tagged in:
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Plant Events from our members
Yorkshirelass On July 1, 2007 Miscellaneous Event
Moved house, not transplanted into new garden
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Discussion Threads about this plant
Thread Title Last Reply Replies
Mistaken Allium? by HemNorth Jul 29, 2017 1:09 AM 3

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