The grasses are usually a mixture of unimproved strains. Weeds such as nutsedge and garlic are often present in a dormant state and will surprise you a few months later when conditions are favorable for their growth. There is no good substitute for sod. It is not necessary to cultivate or work the soil deeply, but all vegetation should be killed and the sod piece placed in contact with base soil. If mushroom soil is added prior to sodding mix it with the underlying soil to a depth of 2 inches to avoid distinct layering.
Textural layers tend to obstruct the normal development of roots.
A light application of lime and fertilizer will often make the difference between success and failure in sodding. The cost of materials is small in relation to the total cost of sodding. Apply 10-15 pounds. Follow this with 50-75 pounds. of ground limestone per 1,000 square feet. Mix these with 1-2 inches of soil when preparing the area for sodding.