We recommend that you set your height-of-cut dial to the same height as you would cut at to start with and see how it goes. The objective is to disrupt the lawn canopy and remove dead thatch material, but not to destroy your lawn. It is better to scarify twice than to try and go as deep as you can straight away.
The other issue is the amount of uprisings you have to dispose of. You may wish to set the cut dial to a depth that gives you a grassbox full for a run there and back before emptying. As your lawn improves, or if this depth isn’t removing enough material, reduce the setting number to 1. If required, you can go as low as S.
Scarify regularly. At least monthly during the growing season.
Hint. You may choose to only engage the rotor and push the mower during cultivations. It gives a better effect. The slower you move forward when scarifying the more effective you will be as the tines have more time to do their work.
For more information, watch this video on scarifying.
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