Turmeric (Curcuma longa) grows well in tropical climates. It likes warm, humid areas with well-drained soil. Sprout small rhizomes at the start of the monsoon, plant sprouted rhizomes in raised porous sandy soil beds, well composted, add manures every 3 weeks, weeding and soil loosening is a constant process and as the leaves turn yellow after 7–9 months stop irrigating. When leaves are completely dry, your turmeric is ready for harvest
Dig out the rhizomes, clean of mud, boil for 3-4mins and sun dry, when semi dry rub in jute bag to remove skin completely. Dry again till hard n grind to a fine powder, and pack in airtight containers