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Ageratum houstonianum

Family: asteraceae
Common name(s): floss flower
Hardiness ratings: USDA zone 2~9 - 10~11

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 Ageratum houstonianum

• Annie's Annuals: Ageratum houstonianum 'Blue Horizon' - Catalog page with photo, basic horticultural information, and noteworthy features. (zone 9-10) (2 photos)
• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (17 photos)
• Floridata - Illustrated informative profile page with notes on culture, usage, and noteworthy features. (zone 5-10) (2 photos)
• Garden.org - Community-assembled plant profile (10 varieties in database) (13 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. (4 photos). Also a page for 'Blue Horizon'.
• North Carolina State University factsheet - Plant profile with horticultural details and comments (zone 2-11) (10 photos)
• Ontario Rock Garden Society: Ageratum houstonianum 'Leilani Blue' - Germination information
• Rob's Plants: Ageratum houstonianum 'Leilani Blue' - Plant profile with basic horticultural information and often personal observations. Also seed germination records. (3 photos)