I have replanted my entire front yard lawn with fescue grass. I scraped off all the existing grass and all weeds. Then place a pervious mat to reduce new weeds from coming through. On top of this mat I introduced 2 inches of top soil and replanted using rolls of seed using Grotrax rolls. I also introduced some Purely Organic Dry Lawn Food and watered at least 3 times per day when it was not raining. The grass came up lush and green. However, 3 months in I am getting brown patches where all the grass seemed to have died.
Can someone help with explaining what might have gone wrong? Could it be brown spot disease? And how could I remedy the situation?