[golfnut]

Are you sure it's an irrigation issue and not a fertilizer/bug control issue. I was hesitant to use a lawn care (fertilizer/bug control) but decided to try it and am very pleased with the results, a couple of my neighbors also signed up with my service. Cost is $22 a month. Also need to make sure you are watering properly, I currently water the front and back rotary heads at 30 minutes each zone, once a week.