Answer: You didn't say whether your lawn was seeded or sodded, and that might make a difference. Dark patches typically mean those areas are not getting enough water. If you are watering regularly but the grass is still getting dark and then dying, the roots are not getting the moisture they need. On a seeded lawn, that would indicate compacted soil; on a sodded lawn, it indicates the roots of the sod are not making good contact with the soil. I'd call the landscaper who originally put in the lawn and ask how the soil was prepared prior to seeding or sodding. The company may be able to explain why the grass did not root properly.
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