Garden waste includes grass cuttings, hedge and shrub clippings, plants and weeds, leaves, twigs and bark, cut flowers, windfalls (fallen fruit) and branches up to 7.5 centimetres in diameter. The garden waste must not be placed in plastic bags as this affects the composting process. Contaminated bins (i.e. bins containing incorrect materials such as plastic, food or kitchen waste, soil, turf, ash, stones, rubble, timber and animal waste) will not be emptied and the contamination will need to be removed before the next collection date.