Lawn turning brown

[azdavidr]

Did you get your soil and available water settings from somewhere or just take your best guess ? I would start with that. If you haven’t looked into it, you might try this:

Using Web Soil Survey to define your soil settings

I found through my own experience that setting an incorrect soil type can have a dramatic impact on the watering duration and frequency of flex schedules. I’d lived in my home for 22 years and always assumed we had a lot of clay in our desert soil. Through these forums I found that was not the case, and instead we have sandy loam. Changing that setting really had a big impact on my scheduling. Finding out your soil type can be confusing, but I personally found the USDA Web Soil Survey site t…

The next part I would consider is your root depth. It could be that the 6" is too deep, so you’re not watering frequently enough, and the irrigation is deeper than it needs to be. I have Bermuda and don’t have experience with Bluegrass, but check out this thread, and the specific comment here:

Root depth

Typically with that type of cool season grass, the roots will be anywhere from 2-6". If the soil is primarily clay anticipate the roots to coincide with the shorter end of the spectrum. In addition, in compact soils, the roots will remain at a shorter depth because there are low levels of moisture and oxygen deeper in the soil. Setting up an “as needed schedule” with the root depth of 2" is a great starting point. The roots are going to do most of their growing during the Spring, after which…