Can nutmeg (jaiphal) and mace (javitri) be grown profitably and what climate does it need?

Nutmeg is a humid tropical tree crop suited to Kerala, coastal Karnataka, the Konkan and similar warm humid high rainfall areas with shade, often grown in mixed gardens with arecanut and coconut. One nice thing is a single fruit gives two spices, the seed kernel is nutmeg (jaiphal) and the red lacy covering around it is mace (javitri), which sells separately and often at a higher rate. A key point, nutmeg trees are mostly male or female, and only female trees bear fruit, so you want a high share of females with a few males for pollination. Grafted plants of known female lines avoid the gamble of seedlings turning out male. It is a long term tree that bears after several years but then yields for decades. Confirm grafted planting material and spacing with your KVK.