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 .