A composition produced from a combination of spent coffee grounds, coffee chaff, and sawdust has a carbon:nitrogen balance of from about 25:1 to about 40:1 and is useful for enhancing plant growth. The mixture has a moisture content of from about 58wt% to about 63wt%. The composition additionally may comprise yeast, e.g. Yarowla lipolytica. Also claimed is a method of producing a plant growth enhancing composition comprising providing coffee grounds, coffee chaff and sawdust, hydrating the mixture, mixing to a substantially homogenous blend and maintaining a substantially aerobic environment within the mixture by intermittent or continuous tumbling to promote decomposition.
