Invasive species are non-native plants that present an increasing threat to ecosystems and minimally managed landscapes throughout the United States. In this project in Madison Connecticut, Tec Landscape Design was concerned about the encroachment of a Common Reed or Phragmites (Phragmites australis) from the marsh into the client's lawn. Phragmites is widespread and invasive, a perennial grass that can grow to 14 feet in height. Following the guidelines of the Connecticut Invasive Plant Working Group, a vertical trench was dug and DeepRoot WB 36 was installed to prevent the future spread. Two years later there has been no invasion of the Phragmites.