Lawn edgers are designed to cut at depths ranging from 0.5 inches to around 3.5 inches, depending on the type of lawn and soil conditions. Most common lawn edgers only cut to a maximum depth of 1 ½ inch, although some can reach up to 2-6 inches deep and 1-3 inches wide. When edging, it is recommended to aim for a 2-inch deep channel for best results.