Don’t be fooled by the name. Ornamental grasses aren’t akin to garden gnomes or sundials. Rather, mixed with other ground covers, they’re the ultimate landscaping tool for people who don’t really want to landscape. The best part? They only need to be trimmed once a year. If you have a large area to cover, and you don’t plan on spending a lot of time keeping it maintained, consider letting the ornamental grasses and ground covers do the hard work.