Rubber cultivation in sri lanka was started by the english. It is our second biggest revenue earner. Rubber is not a native of sri lanka. It is a native of south america. But it grows very well in the middle country of sri lanka. It too, needs plenty of water and sunshine. Many companies do rubber cultivation here because it does not pay very much to have it on small scale. most of the companies grow rubber on estates of over hundred acres. There is chemically produced rubber, known as artificial rubber, in other countries. but natural rubber is far superior to the artificially monufactured rubber.