Indigo is cultivated for about 1500 acres in and around the district of Villupuram in the state of Tamilnadu in India. This comprises about 90% of the total Indigo cultivation in India. Indigo plant is primarily used for three purposes: Firstly for green manuring, secondly for textile dyeing and thirdly, hair dyeing, although, earlier times saw its most popular purpose as textile dyeing. The oldest Indigo dyed fabric dating to 6000 years ago was discovered in 2009 at Huaca prieta, Peru.