Asparagus bean is a string-less legume cultivated to be eaten as green pods. The plant is subtropical/tropical and most widely grown in the warmer parts of South Asia, Southeast Asia, and southern China.They grow well under almost any conditions–very resistant to heat, humidity and insects; great for the South.They are a good source of protein, vitamin A, thiamin, riboflavin, iron, phosphorus, and potassium, and a very good source for vitamin C, folate, magnesium, and manganese.