When rainfall occurs, the plant's poisonous principle disappears. Johnsongrass grows so rapidly that if it is cut before bloom, two or more heavy crops of hay can be harvested yearly. The hay is nutritious, and all kinds of livestock eat it. However, as a forage grass, johnsongrass needs periodic cultivation to maintain its vigor. The stand declines rapidly if it is heavily pastured or cut frequently.
Swine relish the roots which are quite palatable.
If johnsongrass were not so aggressive, it would be a valuable plant. Contributors are welcome and will be acknowledged. Send contributions to Larry W. Mitich. Calif., Davis, CA 95616. Weed Sci., Vol.