Painted in the town of Arles in southern France in November of 1888. (http://www.mfa.org/exhibitions/visiting-masterpieces-0)
Van Gogh had a special interest in sowers throughout his artistic career. All in all, he made more than 30 drawings and paintings on this theme. He painted this sower in the autumn of 1888. At the time, Van Gogh was working together with Paul Gauguin (1848-1903). Gauguin believed that in his work Van Gogh should draw less on reality and more on his imagination.
Here, Van Gogh used colors meant to express emotion and passion. He assigned the leading roles to the greenish-yellow of the sky and the purple of the field. The bright yellow sun looks like a halo, turning the sower into a saint.
(https://www.vangoghmuseum.nl/en/collection/s0029V1962)