You didn't state what variety of millet you have. It makes a big difference. If you have German or Proso millet, the poundage Okie listed is ok. If it is Japanese millet, you need to go lighter, say 10-15 pounds per acre. Japanese has a tendency to not produce heads when planted too thickly. Also, the Japanese is best planted into soupy substrate. It doesn't sprout as well if the soil is dry. Further, you will have more competing vegetation if planted dry and some of those plants have a competitive advantage over the millet. If you are stuck with a dry seedbed, you should disturb it before planting and again after. A small harrow behind the ATV works well, though I have used a cattle panel or bed spring in a pinch. O&N is right, it will take about 75 days depending on your variety to mature. We do plant as late as August and get by, but if you're dependant upon rainfall for filling, you may want to err on the side of early. Japanese millet will do fine with some flooding as long as part of the plant is above water. Other varieties will not.