I did a lawn reno three weeks ago,, grass came up fine and then died. In some areas where I had added several inches of new topsoil to fill low spots the grass is doing fine. Turns out that the lawn has been treated for weeds for many years. drought/grubs had done in the old turf, noting was growing when I did the reno except for nutsedge. Still nothing growing except where the new soil is several inches thick. Customer isn't blaming me, we're both just looking to get him a decent lawn back.