This afternoon I am going to talk about How to Grow corn from seed. Now, I’m going to start by Preparing to plant corn. You can start growing your own corn garden and begin reaping the rewards with a little know-how and elbow grease. Some types of corn prefer warmer/cooler soil and different soil pH levels. Prepare the soil. Corn prefers soil that is nitrogen rich and well manured. Corn requires about one inch of water a week. Typically between May and June is the best time to plant by the beginning of July. The corn is finished growing about three weeks.