Scarifying is the process of mechanically removing thatch and moss from a lawn surface. If done correctly, your lawn should look in quite a bad state as scarifying is a very aggressive process. The surface of the lawn is machined by vertical rotating blades that not only rake out moss, but also dislodge thatch, and if done deep enough, it encourages tillering which is the production of new grass shoots from cut rhizomes' (vegetative reproduction).
Number of Treatments: Typically, once a year every 1 to 2 years.
Timing of Treatments: September through to November, (can also in March/April).
Treatment Type: An additional lawn care treatment.
The benefits are:
- Improved surface quality, by clearing out dead material and moss.
- The best advantaged is gained from scarifying when the lawn is reseeded afterward. This will really turn a tiered lawn around.
- Breaks up the surface allowing water and nutrients to better penetrate.
- A fine bladed lawn often becomes very dense with age. A single pass scarification thins the sward and rejuvenates the lawn, especially if it is aerated and fed at the same time.
The disadvantages' are:
- Dense layers of moss on lawns require it to be scarified in several directions.
- Poor visual appearance for some time after.
- Large amount of debris produced that needs to be disposed of.