Answer: You might want to do a little investigation of the spots that won't green up. It is possible that the roots of the sod are not making good contact with the soil and are surviving only on the water you apply instead of growing downwards into the soil. Take a sharp knife and cut a 6" wide strip or a 12" square out of the sod. Cut down deeply enough to get the roots, too. Then inspect the soil and the roots. Well rooted sod will penetrate the soil 3-6". Poorly rooted sod will remain mostly on the surface. If the roots are not growing into the soil you can loosen and fluff up the soil with some organic matter. Once that's done you can relay the sod, step down on it to make sure its making good contact with the soil and then water it well. I think this will solve the problem with your lawn.
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