A side cart mounted directly to one side of a tractor or rider lawn mowing blade housing deck. The side cart has an opening adjacent to the grass cutting discharge chute. Fastened to the bottom of the side cart is a steel sheet which is bent upwards at the front and rear. In one embodiment of the invention a hard plastic liner is pivotally installed in the side cart. The liner has a long handle attached thereto which permits the user to empty the side cart to the rear of the side cart without using a snow shovel.