Composted cow manure solids (cowpeat) have the potential to be used as an organic amendment during establishment of ornamentals and turfgrass in urban residential and commercial landscapes. Use of the cowpeat as a value added product by the green industry could provide method for dairy farmers to dispose of unwanted animal waste. This study will determine the effects of storage and batch on the physical and chemical properties of the cow peat material. A greenhouse column study will evaluate the potential for leaching losses on N, P and trace elements when cowpeat is surface applied or incorporated into a Zolfo fine sand. We will also evaluate the benefit of soil amendment with cowpeat on the growth and quality of plants in the landscape, and the potential for nutrient leaching at the landscape plot scale.