Yeah, corn doesn’t seem to have that deep of a root system and, when I pulled the old stalks out of the containers last Fall, none of the corn plants seemed to have reached the bottom of my containers and I would describe my plants as exceptionally vigorous and healthy.
...don’t know where you live, but there still could be time to get some corn going. A farmer around here for years has been planting corn around the 4th of July and he always seems to have a decent crop. But he grows the corn for silage and so maybe he isn’t as concerned about what kind of crop he gets as he might be if the corn were for human consumption.
I’m in the northeast. I wonder if it’s too late. Certainly to get seed going.