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Helianthus annus Synonyms: Common Name(s): Sunflower Family: Asteraceae Growth Habit: Annual Invasiveness: Weed Growing Days: 70 to 200 (days) Temperature:
Abs.Max=113° (F) | Opt.Max=93° (F) | Opt.Min=63° (F) | Abs.Min=41° (F) | Precipitation: 24 to 39 (in.) Winter Minimum: 14° (F) Soil pH: 6 to 7.5 Soil Texture/Type: Medium to light Soil Drainage: Well Photoperiod Response: Short day Light Intensity: Bright Comments: Northern two-thirds of US. Quite drought and cold tolerant until flower stage. Diseases: Pythium, Phytothora, Rust, Rhizoctonia, Cercospora, Powdery Mildew, Cephalosporium Uses: Animal Food - birdseed, Weed - possible seed contam., Food - pseudo cereal, Food - oil/fat, Honey - , Environ. - ornamental, Animal Food - fodder, Material - fiber Woodiness: Herbaceous Climate: Steppe and semi-arid, tropical-wet and dry, subtropical, temperate Geographical Origin: Canada, Mexico, USA, Widely cultivated
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