Reynoutria japonica – Japanese Knotweed

Japanese knotweed (Reynoutria japonica) is an invasive perennial that was brought to the U.S. from Asia as an ornamental. Japanese knotweed can be found in moist areas that receive sunlight. It often grows in large thickets in disturbed areas. It can grow up to 15 feet tall and its root system can reach 20 feet […]