Flagstone Landscaping Ideas . You can make your backyard more appealing by using flagstone to build. The lawn could be planted as sod in an additional spot, or perhaps composted. 3 Walkway Designs You Can Easily Install Yourself in 2020 Backyard from www.pinterest.com Remove the grass, as well as topsoil four inches deep out of the area of the pathway. Here are a few of the most popular applications for natural flagstone: See more ideas about outdoor gardens, landscape design, garden design.