Name: greene Savannah, GA (Sunset 28) (Zone 8b) I have no use for internet bullies!
Sweet corn is a wind-pollinated plant. I am not sure if only 3 plants will guarantee that you will have sufficient pollination to get ears of corn. You may have to 'assist' the pollination when the time comes.
Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~"Leaf of Faith"