Who is the Greek Goddess of corn?
Since Dimitra was the goddess of grain, we are assuming that since corn is a grain, she was the goddess of corn. However, corn as we know it is indigenous to the americas and was not introduced to europe until the 15th or 16th centuries, the Greeks who created their god had no idea that corn existed. Had the known of corn and had noted many differenciations of it from the other grains they were aware of, they quite possibly might have not included it with grains and invented a different goddess to govern it. I think we have to assign Dimitra as the goddess of the grains that the greeks knew of and say that there was no goddess of corn.