I have no idea what is going on here, but I'm getting desperate and more worried everyday. I had dropped my mower deck from 2 to 1.5 inches in early august, which definitley scalped it pretty bad--since then, it came back BEAUTIFULLY. However, for the last 3-4 weeks, I have noticed that the lawn is progressively thinning and dying out. It started around the beds around the house, and is spreading outward across the entire lawn. It basically is just thinning to the point of being quite sparse in some areas, where it's basically becoming mud--and again, spreading across the entire lawn. What are some possible diseases or conditions that cause this? this. We have had a VERY rainy spring an summer, and I considered over watering as a factor, but I would think that that would be confined to low areas in the lawn---Not the case here, plus it's spreading. I'm becoming VERY concerned about losing the entire lawn!