Lawn scarification is an important part of any lawn care programme; it is the process of removing organic matter or thatch from lawns. Over time lawns build up thatch from clippings, leaves etc, and when thatch becomes too deep it increasingly restricts the penetration of water, nutrients and air down to the roots. This causes thin weak grass which will be spongy and will allow moss to take hold.
When to Scarify
Scarification should be carried out when the grass is growing, soil slightly moist and avoiding periods of drought; hence Spring and Autumn are popular. In Spring to remove moss and Autumn to rejuvenate with a top-dressing and over-seed added. After heavy scarification the lawn will look worse for a week or so, but soon recovers to a better looking, healthier lawn.