EARTHWORM CASTINGS   Organic Earthworm Castings Worm castings and the microbiological life they contain are a superior soil amendment that provide a wide variety of nutrients. Bag is 1 ounce   $ 0.50          Available: 78           Quantity:     Organic Earthworm Castings 1 Pound Worm castings and the microbiological life they contain are a superior soil amendment that provide a wide variety of nutrients. Bag is 1 pound. $ 3.75          Available: 3           Quantity:     Organic Earthworm Castings 5 Ounces Worm castings and the microbiological life they contain are a superior soil amendment that provide a wide variety of nutrients. Bag is 5 ounces. $ 2.00          Available: 19           Quantity: