This year, I had a lot of thatch in my lawn. I had so much of it in fact that my front lawn developed a fungus. In order to get rid of this lawn disease, I had to spray my lawn with a fungicide. In the future, I would like to prevent this either by renting a lawn dethatcher and power raking my lawn, or else taking the time to aerate my lawn every year.
When you aerate your lawn on a regular basis, it helps to prevent thatch buildup. The reason why is because thatch tends to build up slowly at first. This is because oxygen helps to break down the thatch layer. In time, the thatch layer gets thick enough that the oxygen can’t penetrate, and that means that the aerobic bacteria can no longer break down the thatch that is developing in your lawn. Most of the thatch comes from the grass. A lot of thatch comes from rhizomes and stolons, and some of it even comes from grass clippings. When you take the time to do lawn aeration, you open it up again so that it can breath. This makes it easier for the oxygen and aerobic bacteria to break down the thatch layer.
Another reason why aerating helps break down the thatch, is that the plugs that you get out of your lawn contain bacteria that also helps to break down the thatch. Aerating doesn’t help to get rid of thatch when it is caused by moss, but it does a lot to help your lawn when the thatch is caused by the type of grass that you have.
If you aerate your lawn on a yearly basis, it will make it a lot harder for grass thatch to develop. Since aerating is a lot easier than dethatching your lot, it also helps you to develop a thicker turf by stimulating your grassroots. I strongly recommend that you aerate your lawn every year and see if this doesn’t help to control the amount of thatch you get in your lawn.