Torpedograss: What It Is & How to Deal With It

Torpedograss, or Panicum repens, is an invasive species that is found in the Southeastern United States, from the East Coast across the Carolinas and west into Texas. It’s also found in coastal Oregon and Washington, as well as in the tropics of Africa, Asia, Europe, and Hawaii. It was originally introduced to the U.S. in the 1870s through seeds used for forage crops and was used in the early 1900s by the U.S. Department of Agriculture for planting in pastures to provide a food source for cattle. 

What does Torpedograss look like? 

Torpedograss can be identified by its rhizomatous root structure, which means the weed has sharply pointed tips that resemble a torpedo that stab into the soil and then grow deeply. The stems are stiff and erect, with leaves that are either folded or flat. Torpedograss leaves are typically hairy in appearance on the upper surface. The plant can grow up to 3 feet in height and is green or grayish-green in color. 

How does Torpedograss spread?

This species generally has poor seed germination, so its primary means of reproduction is through rhizomes. Torpedograss rhizomes work down into the soil with very pointed tips and begin to spread and grow deeply. 

Why is Torpedograss a problem?

Torpedograss is in the Poaceae family, which includes a number of grasses that are persistently invasive. It is a perennial that spreads quickly and can often take over the native vegetation. Torpedograss thrives in aquatic environments, often growing in or near ponds, marshes, ditches, and other aquatic environments. However, it can spread across lawns and pastures. Dense collections of torpedograss have been known to impede the flow of water in stormwater applications and limit the use of irrigation holding ponds in some locations. 

How do you manage torpedograss?

Preventing infestations is the key to managing torpedograss, and this includes avoiding the movement of contaminated soil and controlling the rhizome’s ability to expand. This can be difficult if any of the rhizomes are left behind as the plant can re-establish. The best way to eliminate torpedograss is through a specialized treatment with persistent, repeated applications. Fortunately, the experts at got lawn? Tree and Turf Care are equipped to handle torpedograss and other hard-to-kill weeds. Contact us today if you suspect a torpedograss issue with your lawn. Our lawn care technicians will provide an accurate diagnosis and recommend the best treatment option for your lawn’s needs. Contact us today to learn more!