Thatch Removal – Dethatching

If you have a lawn that is too large to use a stiff tined rake for thatch removal there are other methods that are a bit easier and will accomplish the task with relative ease. Special blades are made for lawnmowers that can be purchased at your local hardware store. Essentially there are tines on the blades that extend from the lawn mowing blade vertically so they reach the ground. You then simple push your mower as if you were mowing the grass. It is recommended that you try this first in an area farthest away from view to experiment with getting the lawn mower height adjustment correct as well as the RPM on the mower that works best to remove the thatch and not remove excessive amounts of healthy grass. Rotary lawnmower dethatching blades normally cost around $25-35 dollars and will last a lifetime unless they are subjected to abuse.

Do not begin to remove thatch if the soil is wet. Wait until it is relatively dry to avoid pulling up the grass you are nurturing.

It is recommended that you cut your lawn to about half of its normal height before using your rotary mower with a dethatching blade. You can also use a mower that is specifically designed to remove thatch. These are normally available at local rental centers. In every case, one should be aware that this method will temporarily scar your lawn. If you have an abnormal amount of thatch, such as more than an inch, it is recommended that you not attempt to remove all the thatch at one time. Instead remove the thatch by mowing in one direction and then mow perpendicular the next time and remove the thatch in two layers. This will avoid doing permanent harm to your lawn Don’t be worried. It will look bad temporarily, but will recover rapidly. New shoots will begin to grow after the ground is opened up to enable this new growth. This might also be the ideal time to over seed or top dress your lawn. Removing thatch is normally not an annual event and should only be necessary every 3-5 years or perhaps longer. If you are noting a build-up of thatch sooner than that, you should consider bagging your clippings occasionally or check to see that your mulching lawn mower blade is working properly.

You will note that the thatch that is removed will accumulate on you lawn and it needs to be raked and placed in a mulch pile to insure it doesn’t infiltrate back into your lawn again.


  1. where do you purchase a thatchind blade. i check some harewares and they don.t carey them

  2. All that I have read, about thatching times,are different. Some say Sept. – Oct. others say, Apl. – Jun. I live in So. Ca., 35 miles east of L.A. When would be the best time of year? Thanks.

  3. Richard Schuler says

    I have a Honda Harmony mower and have decided to dethatch my lawn. The only blade I can find, made by Arnold, and carried by Sears, Ace Hardware, etc., states that it wont fit the Honda Harmony models. Is there any other manufactured blades that I can use on a Honda Harmony? (The Honda rotary is the only mower I have.)

  4. Ron Sturn says

    I have a universal blade from Home Depot that fits quite a few models. Worked on my Yardman/MTD that I bought it for and also fits on my newer Honda model. Craftsman and a few others make a universal model as well. They’re more prevalent at big box stores than anywhere else.

    • Ron Sturn says

      Meant to add….go to a hardware store or small engine place that sells mowers and they can order you one to fit your model. If they can’t, don’t, or won’t….you need a new store for your mower needs.

  5. Why users still make use of to read news papers when in this technological world the
    whole thing is presented on web?

  6. Heya are using WordPress for your blog platform? I’m new to the blog
    world but I’m trying to get started and create my own. Do you require any coding knowledge
    to make your own blog? Any help would be really appreciated!

  7. Does everybody else receive an error once this page loads using the hottest Chrome?
    This excellent website for no reason used to do this in the past.
    Anyways, incredible write-up!