If its acidic, you need lime--old fashioned--but still true. If you have low cation exchange capacity (CEC), you need more organic matter--a reading of about 10 or above is ideal.
You may wish to add compost amendments as topdressing.
You may wish to add clover seed--as clover supplies natural nitrogen, and builds better soil. Black medic does the same, but it is an annual legume; flowers are tiny; not so visible.
Be sure to take advantage of the newer seed types as an overseed. Look for premium disease resistant seed that is drought hardy, dense and dark green.
Do not try to grow quality turfgrass without watering it. Do not tell the customer that you can grow grass in heavy shade.
Last edited by RigglePLC; 03-24-2014 at 11:31 AM.