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Echinops ritro

Family: asteraceae
Common name(s): small globe thistle
Hardiness ratings: USDA zone 2~4 - 8~10

General resources

• Wikipedia. Online encyclopedia entry (if defined).
• Google images. Web search for photographs.
• The Plant List. Taxonomical lookup
• Catalogue of Life. Taxonomical lookup

Links for Echinops ritro

• BBC Gardening - Plant profile with horticultural details and garden uses. (1 photo)
• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 3-9) (26 photos)
• Denver Botanic Gardens - Description, native range, and cultural requirements. (additional pages for other varieties) (zone 3) (3 photos)
• Digging Dog Nursery: Echinops ritro 'Veitchs Blue' - Catalog page with descriptive information (zone 4) (1 photo)
• Floridata - Illustrated informative profile page with notes on culture, usage, and noteworthy features. (zone 3-10) (2 photos)
• Garden.org - Community-assembled plant profile (10 photos)
• Heritage Perennials: Echinops ritro ‘Vietch’s Blue’ - Profile with description and horticultural details. (additional pages for other varieties) (zone 2-9) (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 3-8) (5 photos). Also a page for 'Veitch's Blue'.
• North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 2-8) (7 photos)
• Ontario Rock Garden Society - Germination information (use search on page to find this taxon)

Echinops ritro ruthenicus

Common name(s): small globe thistle
Hardiness ratings: USDA zone 3~4 - 8~10

Links

• Annie's Annuals - Catalog page with photo, basic horticultural information, and noteworthy features. (zone 3-10) (4 photos)
• Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 3)
• Digging Dog Nursery: Echinops ritro ssp. ruthenicus 'Platinum Blue' - Catalog page with descriptive information (zone 4)
• Garden.org - Community-assembled plant profile (8 photos)
• 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) (9 photos)
• Ontario Rock Garden Society - Germination information (use search on page to find this taxon)