What disease do I have?
I live in Boulder, Colorado, and have Kentucky bluegrass, this is my first season in this house. Due to the early spring we had, I started watering in early April, and got help from a few rainy days. I also used Scotts spring fertilizer with weed control 3 weeks or so ago.
For the last few weeks I have seen some yellow spots, and thought it could be that the grass was still dormant and needed more water, buy I now realize that is not the problem.
I took this picture from my bedroom window right after mowing it. Any suggestions on what the problem might be? I appreciate your comments.
Here is a link that might be useful: