The answer to 'aeration disease' is that aeration disease, also known as thatch buildup, is a common problem in lawns that can lead to poor grass growth, discoloration, and other issues. It is caused by the accumulation of a thick layer of dead grass, roots, and other organic matter between the soil and the green grass blades. This layer can prevent water, air, and nutrients from reaching the soil, leading to a decline in the health of the lawn.
The main symptoms of aeration disease include a spongy or springy feel underfoot, thinning or discolored grass, and an accumulation of thatch that is more than 1/2 inch thick. The best solution is to regularly aerate the lawn, either by renting a core aerator or hiring a professional landscaping service. This will help to break up the thatch layer and allow for better water and nutrient absorption. In severe cases, the lawn may also need to be dethatched or overseeded to help restore a healthy, lush appearance.