An aerating device for attachment to a self-propelled lawnmower is disclosed. The device comprises a frame having a proximal end, a distal end, and a pair of sides extending between the proximal end and the distal end. An axle is mounted to the frame and extends between the sides of the frame. At least one tine assembly is mounted to the axle for rotation about a tine axis extending longitudinally through the axle. A platform is secured to the frame and extends outwardly from one of the proximal and distal ends of the frame for supporting an operator in front of or behind the at least one tine assembly.
