Answer: The two most common reasons for browning areas in lawn are dog urine and cool season type grasses. These die out in the hot summer weather but green up again in the fall when the weather cools. If you don't think dog urine is the problem, you can overseed the browning areas to help them green up faster. Rake the debris out of the browned areas and overseed with a mixture of warm and cool season grass seeds (Kentucky blue and perennial rye, for instance). This will help the areas stay green in both warm and cool times of the year.
Best wishes with your lawn!
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