Johnson Grass

Also known as Johnsongrass, Aleppo Grass, Egyptian Grass, Commercial Grass

Johnson grass is an aggressive perennial grass renowned for its dual reproductive strategy, spreading prolifically through both extensive underground rhizome networks and wind-dispersed seeds. Originally introduced to many regions as a potential forage crop, it rapidly invades agricultural fields, roadsides, and ditch banks, outcompeting native flora and cash crops alike. Under stress from frost or drought, its tissues synthesize dangerous levels of prussic acid, posing a serious hazard to grazing livestock.