What is the purpose of removing clumps of clippings after mowing?

Removing clumps of clippings after mowing primarily serves to avoid smothering the lawn. When grass clippings are left in large clumps, they can block sunlight and moisture from reaching the underlying grass, which can hinder photosynthesis and water absorption. This can lead to unhealthy patches in the lawn, creating dead spots where grass may not recover.

In addition to preventing smothering, it's worth noting that while collecting clippings can improve the aesthetic value of the lawn, the fundamental concern of smothering is more critical for the lawn's overall health. Clumps left on the surface can also create an uneven appearance and potentially harbor pests if moisture accumulates beneath. Thus, the practice of removing clumps directly promotes a healthier growing environment for the grass.