What‘s the difference of Scarifier, Lawn Mower, and Dethatcher？

1. Lawn Mower – For Cutting Grass

• Purpose: Cuts the top layer of grass to maintain a neat, even lawn.

• Working Depth: Surface only – does not affect roots or soil.

• Best For: Regular maintenance, weekly trimming.

• Keywords: Trimming, appearance, height control

2. Dethatcher – For Removing Thatch

• Purpose: Removes the layer of thatch – dead grass, roots, and debris – that builds up between the grass blades and the soil.

• Working Depth: Light – combs through the grass surface without disturbing the soil.

• Best For: Spring and fall lawn maintenance (1–2 times per year).

• Keywords: Aeration, surface cleanup, thatch control

3. Scarifier – For Deep Lawn Rejuvenation

• Purpose: Uses metal blades or spikes to cut into the soil, removing deep thatch, moss, and shallow weed roots, while slightly loosening compacted soil.

• Working Depth: Deeper – reaches the upper soil layer to stimulate root growth.

• Best For: Reviving compacted or mossy lawns; once a year in spring or fall.

• Keywords: Soil penetration, moss removal, regeneration, aeration

  Tool Main Function Depth Use Frequency Best For Lawn Mower Cuts grass for appearance Surface only Weekly/as needed Routine trimming Dethatcher Removes surface thatch Light 1–2 times per year General thatch removal Scarifier Cuts into soil, removes moss/thatch Deep Once per year Lawn restoration & aeration

  Extra Tip:

  Some machines are 2-in-1 Scarifier & Dethatcher—you can switch between modes by changing the roller (blades vs. spring tines).

  For Example：https://mellif-tools.com/products/mellif-cordless-15in-2-in-1-scarifier-dethatcher-compatible-with-dewalt-20v-battery?_pos=1&_sid=33d7d616b&_ss=r