What is the risk of scalping grass when mowing?

Scalping grass refers to cutting the grass too short, removing a significant portion of the leaf blade. This practice can lead to brown or bare spots on the lawn because when grass is scalped, it often loses its ability to photosynthesize effectively. Without enough leaf area, the grass struggles to recover, leading to stress and potential mortality in the affected areas. These bare spots may also be prone to weed invasions, as they create open space for opportunistic species to establish themselves.

In contrast, uneven grass height occurs naturally due to various factors and isn't a direct consequence of scalping. While scalping is not a method to enhance water absorption or reduce pest infestations, those aspects are generally more resilient when grass is maintained at the proper height. Therefore, the main risk associated with scalping is indeed the development of unsightly and unhealthy brown or bare spots.