Strong soil is the foundation for a great lawn. Use Scotts foundation soil Improver to help strengthen and improve your soil to give your lawn a solid base. Scotts soil foundation soil improver contains natural ingredients that can help reduce soil compaction, boost water and retention, as well as support improved soil quality. Okay to use with all grass and soil types in lawns and gardens. Apply with a Scotts broadcast, rotary, drop or wizz spreader. Apply in the spring to prepare for the growing season or in the fall for overseeding or aeration. To improve the soil ahead of the growing season, apply Scotts Foundation Soil Improver in the Spring. To improve soil conditions for overseeding and aeration, apply in the fall.