Scarification should be carried out at least once a year to remove any organic matter such as thatch and moss formed around the base of your lawn. It also helps tidy up any straggly lateral growth.
For those of you out there who don’t know, thatch is your lawn’s upper layer that consists of decaying leaves and other plant materials. If it is not tended to in a timely manner, thatch dries out, thickens and creates a barrier through which moisture and nutrients have a hard time passing. And this leads to your grassroots suffocating.
Thus, scarification needs to be performed in order to remove such thick thatch layers.