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Helianthus annuus
Helianthus annuus

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Zone
Zones A1-A3, 1-45, H1, H2
Full Sun
Full
Regular WaterMinimal Water
Moderate, Minimal

Helianthus annuus

Sunflower
Asteraceae (Compositae)
Annuals

HELIANTHUS

Coarse, sturdy plants grown for their familiar, colorful blooms in summer and fall. Most are prime subjects for cut flowers. Plants are tough and widely adapted. Perennial kinds spread rapidly and may become invasive. Tall sunflowers may need staking. 

Helianthus annus
Helianthus annus

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Helianthus annuus

The wild ancestor of today’s familiar sunflowers is a coarse, hairy plant with 2–3-in.-wide flowers, native to much of the central United States and southward to Central ­America. It is the state flower of Kansas and the only plant native to the lower 48 states to have become an important agricultural commodity. It has been bred to produce giant plants as well as a host of smaller (but still significant) varieties for garden decoration and cut flowers. Most sunflowers used in gardens are 3 to 7 ft. tall.

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