Fixing a Mushy Newly Seeded Lawn on Clay Soil

The homeowner tilled 8-10 inches deep, added manure, and now the soil is too soft. The expert confirms the depth is fine; organic matter improves clay. Water settles at the clay pan 8-10 inches down. The watering program must be adjusted: water lightly, check moisture at depth with a probe, and avoid overwatering to prevent water accumulation at the clay layer. Seedlings need consistent moisture but not saturation.