Earthworm castings Listed by the Organic Materials Review Institute (OMRI) for the production of organic food and fiber Excellent for use as a top dressing diluted to make a rich liquid tea or mixed with soil to stimulate plant growth Improves soil structure and increases microbial activity in a way that outperforms most commercial fertilizers Minerals and nutrients from earthworm castings are in a water soluble form readily available to plants Contains earthworm castings and Canadian sphagnum peat moss Western region only 16 quart Length: 14 Width: 27 Height: 6