It includes tea estates and facilities in the districts of Darjeeling, Jalpaiguri, Cooch Behar, Kishanganj and North Dinajpur in West Bengal.
Tea cultivation in the North Bengal began about 120 to 150 years ago in Dooars region, during the colonial British Raj period.
In the year 1840 tea was planted in Darjeeling district and adjacent areas in North Bengal.
Small tea growers are largely concentrated in North Dinajpur, Kishanganj, Jalpaiguri, Cooch Behar, and at the foothills of the Darjeeling Hills.
There are 30,000 such small tea growers in North Bengal and total production is around 91 million kg, which is almost 32.5% of North Bengal's tea production of 280 million kg.