The farming of the major crops of Indus Valley Civilization started during 4000 BCE. Since then, people of this civilization started growing the crops according to the seasons.
Major crops like Wheat, Lentils, Barley, Peas, Mustard, and Linseed were grown mostly during the winters and other crops like Millet, Cotton, and Sesame were produced during the summers.
With the farming, civilization took a step ahead towards the advancement as people started trading the crops they grew throughout the year. The improvement in the field of agriculture and trading also played a vital role in the establishment of civilization in a proper manner.