Optimal climate for growing saffron is warm, sub-tropical climate. Saffron grows well at an altitude of 2000 meters above sea level. It needs a photoperiod of 12 hours. In other words, it needs 12 hours of sunlight for good growth. So, saffron can be grown in Uttarakhand and some farmers have already found success in saffron farming in Uttarakhand.
Learn more about saffron farming in India.