Abstract: Apparatus for trimming grass around a sprinkler head. The apparatus comprises a body rotatable about a vertical axis and having a bore for fitting over a sprinkler head during rotation thereof and a peripheral portion surrounding the bore. At least one cutter attached to the peripheral portion and comprising a wire having an end portion defining a cutting blade and preferably an intermediate portion formed into a coil defining a spring which allows protective movement of the cutting blade when an obstacle is encountered. The cutting blade extends downwardly at an angle relative to the rotational axis, preferably radially inwardly.