... and needs temperatures between 20°C and 30°C, and a considerable amount of annual rainfall to thrive (Materia Indica, 1826 ... , Whitelaw Ainslie, M.D. M.R.A.S., via Google Books). Plants are gathered annually for their ... active ingredient is and it has a distinctly earthy, slightly bitter, slightly hot flavor and a mustardy smell.Turmeric powder is yellow ...