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Bob Morris

Gardening columnist

Bob Morris is a horticulture expert and professor emeritus of the University of Nevada, Las Vegas. Visit his blog at xtremehorticulture.blogspot.com.

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Faulty irrigation system can produce brown spots in lawn

Q: We installed a lawn 18 months ago, but it has a difficult time during summer months. I aerate it and fertilize it, and I know the drainage is good because the landscaper installed the system to our HOA requirements. I water twice daily, six days a week around 5 a.m. and 9 p.m. There is a decent amount of shade, and the yard faces south. Even the heavily shaded areas have problems. What can I do differently?