Abstract: A spreader is attachable to a conventional lawn mower to spread granular material over the area cut by the mower. The spreader has a hopper, at least one adjustable orifice at the bottom of the hopper, and a rotating regulator for dispensing granular material behind the lawn mower. In one embodiment, a first sprocket attached to the wheel of the lawn mower, and a second sprocket attached to the spreader receive a chain for driving the rotating regulator of the spreader. In a second embodiment, the spreader is driven by a pair of bevel gears, one of which is mounted on the rear axle of the mower. A novel drive does not convey rotational movement to the impeller of the spreader when the mower is moved a short distance backwards. Also, the lever operating the clutch to engage power to the Pear wheels simultaneously operates a stop to block the flow of particulate matter out of the hopper of the fertilizer spreader.