This map shows the overall suitability of this crop in the state of Illinois.
Overall Suitability Map
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Helianthus annus

Common Name(s): Sunflower
Family: Asteraceae
Growth Habit: Annual
Invasiveness: Weed
Growing Days: 70 to 200 (days)
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
Northern two-thirds of US. Quite drought and cold tolerant until flower stage.
Pythium, Phytothora, Rust, Rhizoctonia, Cercospora, Powdery Mildew, Cephalosporium
Animal Food - birdseed, Weed - possible seed contam., Food - pseudo cereal, Food - oil/fat, Honey - , Environ. - ornamental, Animal Food - fodder, Material - fiber
Steppe and semi-arid, tropical-wet and dry, subtropical, temperate
Geographical Origin:
Canada, Mexico, USA, Widely cultivated
Metric Units

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Last Modified: October 17, 2012
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