Organic soil amendments formulated to loosen hard-packed soils, general-purpose mixes that include sand, and compressed coir (coco) fiber bricks are described as effective for loosening heavy clay and improving soil structure for leveling a lawn.
Some organic amendments supply gypsum, humic acid, calcium, and sulfur to improve soil structure and nutrient uptake during lawn leveling.
Pack sizes range widely: weights reported span about 0.75 lb up to 40 lb, and capacities run roughly from 10 quarts up to 240 quarts across available products.
General-purpose planting or top-dressing mixes are typically ready to use straight from the bag, making them suitable for quick lawn top dressing and filling low spots.
Common materials include sphagnum peat moss, compressed coco (coir) fiber bricks, general peaty mixes often blended with sand, and organic soil amendments that add gypsum, humic substances, calcium, or sulfur.