Answer: I don't think the problem is in watering (you have certainly tried to keep the roots moist!), but rather than fescues are cool season grasses. Cool-season grasses grow primarily during spring and fall. They become dormant during the hottest part of the summer and the coldest part of the winter. They are usually green year round but may turn brown under extreme heat and cold. Cool-season grasses include tall fescue, bluegrass, turf-type fescue, perennial ryegrass, and mixtures of any of these grasses.
To maintain a green lawn throughout the summer, you'll want to overseed your existing lawn with some warm-season grasses. Your local nursery may even have a custom blend - why not ask?
Best wishes with your landscape!
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