What is a dethatcher (or scarifier)?

A scarifier, or dethatcher, is a tool that is used to remove thatch from lawns. Scarifiers come in many forms, from manual models to tow-line scarifiers that can be pulled behind a tractor. Proper timing is crucial or a scarifier can harm your lawn instead of help.

A tow-behind dethatcher is a simple wheeled device with multiple prongs extending from it that can be towed behind a tractor or riding lawn mower. The prongs drag along the ground to loosen built-up thatch and make a lawn healthier.