Perennial ryegrass (Lolium perenne) is found in lawns all across the United States. In cooler climates, it's a popular cool-season turf grass for permanent lawns. In warmer climates, it's often ...

Perennial ryegrass is widely used on lawns throughout the U.S. Being a cool-season grass species, it flourishes during the colder parts of the year. In some northern parts of the country ...