Answer: Since the area was once a walkway I suspect the soil is compacted, which can make grass roots struggle to penetrate into the native soil. Without the ability to grow into the soil, the area is probably suffering from droughty conditions even though you water regularly. For a permanent fix I'd suggest digging or rototilling the area up, spreading 4-5 inches of organic matter such as compost, and digging it in to a depth of 6-8 inches. Then level the area, broadcast seeds (or lay new sod) and water well until the new lawn becomes established. I think this will solve the problem. Good luck with your project!
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