Corn cross polination

I have five acres. I planted Johnny Red at one end of the property and Hickory King at the other. Should cross pollination be an issue?

Hi Don,
I am not a corn pollination expert, but I believe five acres apart should be enough. A five acre plot, however, could have parts that are more narrow. How big is each planting? (Did you plant a small garden size or plant a whole acre?) If there are trees and things in between, you might be able to get away with less. The Internet seems to say somewhere between 250ft and a mile is the distance. So real specific :)

The plots are relatively small, 40X60. I've got squash and beans in with them. There's not a tree on the place. I should plant a shrub or something, I suppose.

I have planted three types of corn only 15' apart- a sweet corn, popcorn, and flour corn. My property doesn't get much wind, especially in summer, and I've always had to hand pollinate my corn to get better results so I figured it wouldn't cross pollinate much and it didn't!

I even had success growing the saved seeds of the flour corn the next year. There was the odd kernel on the occasional ear here and there but the vast majority of it was perfect.

So I would say it really depends on wind. Also I wouldn't do it if I were planning on selling seed but only for my own purposes.

Here's a picture of how close I was able to plant my corn.

As long as Johnny Red and Hickory King aren't too close in proximity, it shouldn't be a problem. Cross pollination can get a bit tricky, but with your five acre buffer, it looks like you're doing all the right things!