Answer: If you had a landscaping company lay the sod, I would contact them directly about the problems. If you laid it yourself, then you'll need to try to determine what the problem is. It's possible that the problem areas received insufficient water for good root development, for example, or perhaps water pooled there and drowned the plants. It is important to try to figure out what caused the problem before attempting a solution. Maybe there were lumps in the sod, so when you mowed you scalped those areas, leading to the browning. I would try to analyze the area before proceeding.
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