Farmwithjunk
Super Member
yak651 said:How far apart do different varieties of corn need to be? I would like to try a couple of different varieties of super sweet, but afraid of the cross polunation. If they have different number of days to maturity can they be planted closs together as they won't pollunate at the same time?
Far enough that the wind won't carry pollen.
So long as the FIRST planting to tassle still has some pollen left to fall on the SECOND variety that silks, you stand a good chance of cross-pollenating.
I grow a good bit of popcorn as well as quite a bit of sweetcorn. I normally plant the sweetcorn first, the the popcorn as late as 3 to 4 weeks down the road. (This year I'm going about that in reverse order) I plant the 2 plots about 500 yards apart, on opposites sides of a slight hill. I've still noticed SOME cross-pollenation on the edges of the fields. Wind and birds can carry pollen quite a way.
Ever see how seed corn growers "de-tassle" a corn field, then "force pollinate" after the crop silks? They also grow seedcorn in isolated fields, usually surrounded in every direction for a long, long way by hayfields or soybean fields. That's to eliminate random pollination.