I have a tall fescue type lawn (marathon sod) its supposed to stay green year round. Right now (early spring) it looks great. over the last few years, as soon as the warm summer temperature rises the lawn starts to yellow and brown out. Then as soon as fall set in the lawn seems to perk up and turns to a nice lush lawn again. I thought summer was the best time for this type of lawn.

I have tried aerating the soil and fertilizing regularly. I do seem to have problems with soil compaction. I'm getting frustrated that fertilizing and aerating does not seem to help. What am i doing wrong? Apprecate any tips or suggestions.