- Putting sorghum with your plant rotation has the potential of lessening the emergence and growth of pigweed plants. The flowers are small, green and crowded into coarse, bristly spikes at the best of your plant. Lesser spikes can be found while in the leaf axils under. Soil management: Pigweed https://pgzeed42086.vblogetin.com/43938720/rumored-buzz-on-pgzeed