Leaves stayed on grass all winter. cleaned them up a week ago. grass is dead underneath. One of the spots might come back once it gets air. maybe. Sod was put down last year. not me. Now my solution to save this lady money would be aerate and over seed. she wants sod but doesn't want to spend the money again. I told her the seed would work as an alternative to spending a bunch of money. total about 500 sq ft. Any suggestions that would make it come back real good. besides tear out and replace.