Abstract: An attachment for a roto-tiller adapted to aerate and fertilize ground in preparation for seeding and planting which comprises a pair of rotatable cylinders adapted to replace the conventional tiller tines and to attach to the rotatable shaft driven by the roto-tiller unit; a plurality of spaced aerating spike members distributed uniformly around each of the cylinders; a plurality of ports or openings in each of the cylinders, the openings likewise being uniformly distributed about the external periphery of the cylinders; spring-loaded dispenser plugs positioned in the openings to be activated by each contact with the ground as the unit moves and the cylinders rotate; and dispensing valves located within the ports of the cylinders to dispense liquid fertilizer from inside the cylinders.