A biodegradable grass and debris catcher is attached to an exit chute of a lawn mower and garden vacuum/blower discharge chute to collect grass clippings and debris. The biodegradable grass and debris collector bag, containing grass clipping and debris, is composted or disposed of in a landfill without incorporating polymeric residue. The biodegradable grass and debris catcher has a plurality of layers, preferably three layers, of industrial strength paper. A plurality of air vent holes on side walls of the bag release discharged air while trapping grass clippings or debris. The industrial strength paper may be reinforced with biodegradable cotton fibers.