The Job's tears are born in moist areas, but can tolerate flooding and drought. China is cultivated throughout the country, south of the Yangtze River is the main producing areas.

The main production Fujian, Hunan, Guizhou, Hebei, Liaoning. Objectively speaking or Liaoning is better, the color is slightly darker, the growth time is long, the temperature difference between day and night is large, the starch content is high, the taste is better