Tata Tea's plantations in South India are located in the Western Ghats in the western part of the State of Kerala. The two estates are in the Idukki District, Kerala usually known as the Kanan Devan Hills of the High Range.

The estates in the High Range are clustered around the town of Munnar (10º5'N 77º4'E), which is about 145km from Cochin. Situated mostly on the inner slopes of a basin-like plateau, these estates lie at elevations varying from about 1300m to 1900m above mean sea level. Munnar is at about 1500m. Some of the tea fields at 2100m are among the highest in the world. The highest peak in India, south of the Himalayas the Anaimudi (2695m) - is situated in the High Range.

Temperatures in the High Range seldom rise above 30ºC or drop below 0ºC. Being situated on the edge of the escarpment which faces the Arabian Sea, the annual rainfall varies from 130cm in Chittavurrai, the eastern-most estate, to 800cm in Kalaar at the western end, all within a distance of 26km.

Four-fifths of the total annual precipitation occurs during the months of June-September. On the other hand, December-March is dry and sunny, with warm days and cool nights.