Scientific Name
Allium (al-lee-um)
Common Name
Ornamental onions

Geophyte Organ:  Bulb

A. christophii
Light Requirements: Full-PM Sun
Height: 12-48 inches (30-120 cm)
Flowering Season: Late spring/Early summer
Flower Color: Red, white, purple
Planting Time: Fall
Planting Depth: Cover 5-8 inches (12.5-20 cm)
Spacing Between Bulbs: 6-12 inches (15-30 cm)
Hardiness: Hardy III - injured below 5°F (-5°C) to Tender III - injured below 25°F (2°C)
Bulb Storage: If lifted, store bulbs dry at 68°F (20°C)
Comments: Prefers well-drained soil; can be grown in containers
Cultivars: A azureum (blue; 2'), A. caeruleum (blue; 10-12"),  A. christophii (amethyst; 12 18"), A. aflatunense (purple; 24-36"), A. moly (10-12"; yellow), A. oreophilum (10-12"; red), A. neapolitanum (white; .5-1'), A. cowanii (20",white), A. giganteum (lilac-purple; 36-48"), A. karataviense (pink, purple; 8") A. hollandicum 'Purple Sensation' (3'; reddish-violet), A. africanus, A. senescens ssp Monatnum, A. stellatum, A. spaerocephallum (wine; late flowering; 2-3'), A. 'Unifolium' (lavender-pink; 12-18"), A. scherbertii, A. scorodoporansum
   
  USDA Hardiness Zones
2 3 4 5 6 7 8 9 10 11
- M M H H H H H H -
C=container; H=hardy; M=hardy with mulch; Sp=plant spring, harvest fall; F=fall plant

 

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