This map shows the overall suitability of this crop in the state of Illinois.
Overall Suitability Map
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Dioscorea batatas
Synonyms: D. opposita

Common Name(s): Chinese yam
Family: Dioscoreaceae
Growth Habit: Perennial
Invasiveness: Weed
Growing Days: 160 to 180 (days)
Abs.Max=97° (F)    Opt.Max=86° (F)
Opt.Min=70° (F)    Abs.Min=52° (F)
Precipitation: 47 to 102 (in.)
Winter Minimum: 37° (F)
Soil pH: 6 to 6.7
Soil Texture/Type: Light to medium
Soil Drainage: Well
Photoperiod Response: Short day
Light Intensity: Bright to clear
Root can take 3-4 years to reach full maturity. Satisfactory after 1 year, but it is better to wait.
Anthrachose, Cercospora
Weed - , Medicinal - folklore, Food - vegetable, Environ. - ornamental, Food - starch


Geographical Origin:
China, Eastern Asia
Metric Units

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Last Modified: October 17, 2012
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