A family member of mine asked me how to fix a spot in his lawn where their landscaper spilled fertilizer last year (I can't remember if it was spring or fall). The landscaper did what he could to clean it up and, because it completely annihilated the grass, came back and sodded the area, but the sod didn't survive. Has enough time passed to sod the spot again? Or is there anything he can do to help the soil?