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Helianthus giganteus

Family: asteraceae
Common name(s): Giant Sunflower
Hardiness ratings: USDA zone 5~6 - 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 Helianthus giganteus

• Connecticut Botanical Society - Wildflower profile. (1 photo)
• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 5-11) (1 photo)
• Digging Dog Nursery: Helianthus giganteus 'Sheila's Sunshine' - Catalog page with descriptive information (zone 6)
• Garden.org - Community-assembled plant profile (1 photo)
• Illinois Wildflowers - Informative illustrated page with description and cultivation details, also covering range and faunal associations. (2 photos)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation. (4 photos)
• Ontario Rock Garden Society - Germination information