Last summer, the application during late July caused our large parts of our otherwise healthy front and back lawn to turn yellow. I called TruGreen and a specialist came to talk with me. He thought the treatment brought out leaf blight. He treated the areas with Revive, and it eventually turned green again. This year, when setting up our service, I asked that they skip the July service as this particular treatment has caused the yellowing in previous years as well. The person on the phone went over our service requests and the cost which I prepaid to save 10%.