Johnson Grass
Overview:
- Johnson Grass is an upright perennial grass, reproducing by rhizomes and seeds.
- It is well adapted to compete with crop plants.
- Stems reach up to 6 to 8 feet high or more, from a freely branching fiberous root system, which produces extensive rhizomes within six weeks of germination.
- The leaves alternate, simple, relatively wide and long.
- Spikelets are 1-flowered, in groups of 3, in large open panicles.
- The fruit is a caryopsis or grain, finely striate, reddish-brown with two knobbed rachillae extending upward from the base of the seed.
- Flowers from May until frost and seeds to frost.
Information referenced from "JOHNSON GRASS" published by the Kansas State Board of Agriculture Plant Health Division.