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Family: amaryllidaceae
Common name(s): ornamental onion
Hardiness ratings: USDA zone 4~5 - 8 
General resources
Links for Allium caeruleum
- Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 4-8)
 (8 photos)
- Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 5) (8 photos)
- Garden.org - Community-assembled plant profile (33 photos)
- Iris' Garden - Gardener in the Netherlands presents a photo of this plant, with basic horticultural information. (1 photo)
- Missouri Botanical Garden - Plantfinder page for one of the plants growing at the garden, with usually one or more photos, horticultural information, and noteworthy characteristics. (zone 4-8) (3 photos)
- NARGS Image Gallery - Photograph(s) contributed by North American Rock Garden Society members. (1 photo)
- North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 4-8) (8 photos)
- Ontario Rock Garden Society - Germination information (use search on page to find this taxon)
- Pacific Bulb Society - One of the plants described on this page about the genus. (7 photos)
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