Any time the ground is still heaving is good.
I once broadcasted into about 6 inches of snow on a warm day. It worked well. I could see how much seed was on the snow. But because it was warming up the seed sank through the snow pretty quickly.
I personally don't like bluestem or Indian grass because the snow knocks them down.
BUT I've never tried them with switch in the mix so I can't tell you it won't help with Stand ability in the winter.
Just curious, are you required to use ecotypes native to Ohio, or just because switchgrass in native to Ohio, you could plant Kanlow(KS ecotype) or Alamo(TX ecotype) in that area?In this particular field I have to stay with native to Ohio plants, it's in the WRP.
Then I guess you are not planting Cave-in-Rock?Native to Ohio
Were going to plant about 4 acres of straight cave in rock switch end of this moth (FEB) into last years corn field , but hoping to plant a few "islands" of red cedar within the area. Each island will have 4 or 5 cedars where i will try not to let the seed fall. Maybe if i burn the field slow and careful after a few years it wont ruin the trees and well have some tempting looking bedding spots for the whitetail :) No government programs for me...Not worth the BS for just the few acres.