Dethatching, or power raking, is only performed in the Spring. It is done with a machine that on the underside has vertical spinning teeth, basically a motorized rake. It is the process of raking old dead grass, old leaves, and unbroken down thatch out of your lawn’s Root Zone. Power Raking is not as important as Lawn Aeration for some lawns. Lawn Aeration itself will help with thatch if the thatch level is a ½ inch or less.
Dethatching is not for every lawn but depending on the lawn it could be essential. If water doesn’t seem to want to penetrate the surface of the lawn, has necrotic ring spots, or has areas where you can see good green grass trying to poke through a lot of brown and seems to be struggling or “choking”, your yard could be carrying excess thatch and may need to be dethatched.
Dethatching too deep can be damaging to the lawn making longer recovery time, but dethatching done properly will remove matted turf and will promote a quick Spring green-up by letting air move to the root zone and warm the turf. dethatching is a great idea if you’re going to over-seed, (out with the old and in with the new). Dethatching also allows for deeper Lawn Aeration holes. By removing a thick thatch layer, the aeration machine has less material to go through to get to the soil. When completed you will see all the buried thatch that has been brought to the surface. We then rake and/or mow all the debris.
The process usually takes a little over an hour, in which raking thatch by hand with a metal rake may take someone several weekends!