Steer-Gro is a 50/50 mix of aged barnyard manure and sawdust. This ready-to-plant, all-natural soil amendment is best if mixed in to your existing soil to add a healthy blend of nutrients and to loosen clay-like soil. Amending your soil with Steer-Gro will yield greener and healthier vegetable gardens, lawns, flowers, trees, shrubs and more. Add it to your existing soil to make excellent topsoil.