Antler King Red Zone Contains high protein forage and grain soybeans, high protein forage peas, succulent buckwheat and sunflowers. Can be planted May thru August in the northern U.S. and March thru September in the southern U.S. When planting in the fall plant at least 60 days before the first expected frost. Best planted with a drill, but if a drill is not available, broadcast the seeds and then drag them into the soil. 20 lb. bag which plants 1/2 acre.