Regular scarifying is an essential measure to prevent waterlogging, damage and lawn diseases. Scarifying means that the turf is mechanically scarified a few millimetres from the lawn with rotating blades, thereby breaking up the surface. Any moss and resulting lawn felt are removed and the soil can absorb nutrients without hindrance. The grass roots get more oxygen and the lawn becomes denser and more durable. Visually, this results in rich green and weed-free lawns.
Scarifiers are mainly used in spring during the growth phase. They should be scarified at least once a year to ensure balanced aeration of the soil. If the soil is damp, however, scarifying should not be carried out. A daytime temperature between 15°C and 20°C (59°F and 68°F) would be ideal. In summer, when the lawn is used intensively, scarifying should also be avoided.