What season and climate does kale need in India?

Kale is a cool season leafy cole crop and grows best in mild to cool weather, roughly 15 to 25 C, giving the sweetest, most tender leaves in cool conditions. In the plains it is mainly a winter crop, while hill areas can grow it over a longer cool season. It is fairly hardy and tolerates light cold better than many greens, but in real heat the leaves get tough and bitter and pests increase. It is a cut-and-come-again crop, so you harvest outer leaves repeatedly over weeks. Confirm exact sowing windows for your region with your KVK.