Tea has a stimulating effect in humans primarily due to its caffeine content. Tea originated in Southwest China during the Shang dynasty, where it was used as a medicinal drink. An early credible record of tea drinking dates to the 3rd century AD, in a medical text written by Hua Tuo

Tea plantation in Munnar,Kerala

At times Rohini Thirunal Kerala Varma Valiya Raja was the head of the royal family. … But it was neither Munro nor Turnor, who started tea cultivation in Munnar, but … It is India’s first ever tea museum, ideally placed at KDHP’s

Processing and classification

  • White: wilted and unoxidized;
  • Yellow: unwilted and unoxidized but allowed to yellow;
  • Green: unwilted and unoxidized;
  • Oolong: wilted, bruised, and partially oxidized;
  • Black: wilted, sometimes crushed, and fully oxidized (called 紅茶 [hóngchá], “red tea” in Chinese and other East Asian tea culture);
  • Post-fermented (Dark): green tea that has been allowed to ferment/compost (called 黑茶 [hēichá] “black tea” in Chinese tea culture).


In 2017, global production of tea was about 6 million tonnes, led by China with 40% and India with 21% of the world total (table). Kenya, Sri Lanka, and Vietnam were other major producers