I've found something that works great for me.I water 7 times a week.Here's what I'm doing. Let'ssay I have a zone that normally would run 35 minutes twice a week. I run that zone 7 days a week for 10 minutes. I also make sure the whole cycle is done by 5:30 a.m. This gives the water time to reach the roots before evaporating in the summer sun. Before we started doing this last year my lawn looked burnt & dry .Now we're very pleased with the healthy green look . Seems like our lawn appreciates it's daily drink.