Orange Beach, Ala. – (OBA) – In just a few weeks, roadsides across Alabama will display waves of fluffy white and maroon grass. Although it may seem attractive, experts say this plant is actually cogongrass. It is considered one of the most damaging invasive plants in the state. Despite its beauty, cogongrass poses a serious threat to Alabama’s environment.

Cogongrass comes from Asia and Africa and spreads fast across fields and roadsides. It forms thick mats that block out native plants, harm pastures, and disturb wildlife. The plant spreads through seeds and underground stems called rhizomes. This makes it very difficult to control once it takes hold.

Scientists first found cogongrass in Grand Bay more than 100 years ago. It was once sold as "Japanese blood grass" because of its red color. Now, experts call it one of the Southeast’s worst invasive species. Its spread has created major problems for landowners and road crews.

Weed scientist David Russell with Alabama Extension says it takes years to manage cogongrass. Herbicides like glyphosate and imazapyr have helped, but spraying must be repeated for two to three years. The plant often returns even after treatment. This makes early detection crucial.

Russell is working with the Alabama Department of Transportation (ALDOT) on cogongrass control. Together, they are testing herbicides and new weed control tools. Their goal is to slow the plant’s spread along highways. They also train crews to spot and respond to infestations quickly.

Cogongrass usually grows in thick, circular patches. It stands 2 to 3 feet tall, but can grow as high as 6 feet. It has fluffy white seed heads, yellow-green leaves, and a white center vein. These features help people recognize and report it.

This harmful weed spreads mostly by wind and contaminated gear. Mowing, burning, and bush hogging can spread it even faster. People should clean their shoes, vehicles, and tools after working in infested areas. Stopping the spread requires careful attention to every detail.

Several groups are fighting cogongrass across Alabama. These include Alabama Extension, Auburn University, and the Alabama Forestry Commission. They focus on research, outreach, and teaching the public how to spot the plant. They ask residents to report cogongrass as soon as they see it.

For more information, visit the Alabama Extension website at www.aces.edu. You can also read their guide, Stop Cogongrass Hitchhikers, for help with identifying and managing the weed. Quick action can help protect Alabama’s land. Every report makes a difference in the fight.

Cogongrass Management FAQ - Alabama Cooperative Extension System