Indian tea culture the Yandaboo Treaty. In 1837, the first English tea garden was established at Chabua in Upper Assam; in 1840, the Assam Tea Company began the commercial production of tea in the region, run by indentured servitude of the local inhabitants. Beginning in the 1850s, the tea industry rapidly expanded, consuming vast tracts of land for tea plantations. By the start of the 20th century, Assam became the leading tea producing region in the world. But despite the discovery of the indigenous "Camellia sinensis" plant, the tea industry in India began with 42,000 seedlings germinated from a consignment of 80,000 seeds
Tea growing in Azerbaijan tea leaves (mainly black) was produced in Azerbaijan. In 1983, tea-growing in Azerbaijan spread to 9.3 thousand hectares area. However, with the collapse of the USSR, the tea production in Azerbaijan began to deteriorate. Moreover, in the 1990s, Nagorno-Karabakh conflict had an extremely adverse impact on tea production — the volume of tea production dropped to 1,200 tons by 1995. With the development of market relations in Azerbaijan, tea production began to revive, including through joint relations with Turkey and the United Arab Emirates. The tea produced in the country is mostly green, but black tea is also quite common