First of all, we use all organic products. With this year's rains our St. Augustine looks great except under a couple of trees. It is yellow-green and pretty much in the shape of the trees' folage. We fertilized the entire yard with Lady Bug. Everything is growing and green except in these areas under the trees. It may be that the grass isn't getting enough light or water. Any ideas?

You may want to post this under the "Lawn" section.