Listed as one of the world's ten worst weeds, cogongrass is an invasive perennial grass. In Florida alone, it has spread to more than a million acres. Cogongrass usually invades open areas like golf courses, roadsides, pastures, and natural areas where it displaces native plant species.
Floridians should recognize cogongrass in case it pops up on their own property. It grows in bunches that can reach six feet tall. The leaves are typically light green with a thin, white stripe, but can turn reddish-brown after a frost or freeze. In spring or summer, the plants produce fluffy white seed heads.
Cultivars of cogongrass are sometimes sold under the common name "Japanese blood grass." However, you shouldn't plant these cultivars since they can revert back to the aggressive form.
- Center for Aquatic and Invasive Plants: Cogongrass
- Invasive Plants: Cogongrass
- UF News: "Aggressive weed becoming a menace worse than kudzu, UF researcher says"
- Cogongrass (Imperata cylindrica (L.) Beauv.) Biology, Ecology and Management in Florida
- A New Twist in Managing Cogongrass