A turf treatment trailer attachable to a ride-on lawnmower. The turf treatment trailer comprises a drawbar which is detachably attachable to the ride-on lawnmower, a frame connected to the drawbar, a first ground-bearing trailer wheel rotatably mounted on the frame, a second ground-bearing trailer wheel rotatably mounted on the frame and at least one turf treatment unit detachably attached to the frame. The turf treatment unit is positioned on the frame to trail the first ground-bearing trailer wheel so that in use when the turf treatment trailer is attached to the ride-on lawnmower which is moving forward over the ground, a substantially common area of the turf on the ground is sequentially traversed by the first ground-bearing trailer wheel and treated by the turf treatment unit.
