A heavy layer of mulch on the other hand inhibits the circulation of air and suffocates the shooting grass from underground. Wet grass cuttings tend to suppress new buds from growing and as they decompose, they can “burn” the sprouting grass beneath. Note that spreading wet clippings or a heavy layer of mulch may hinder the sprouting of underground grass rhizomes and cause a greater extent of bald spots. The clippings also preserve moisture in the soil preventing evaporation and moderating the temperature of bald spots.Īs the nutrients get absorbed into the soil, the grass rhizomes get nourished and grow into a new grass cover, covering the bald spots. When you spread a thin layer of grass clippings on the bald surface, it decomposes to organic manure rich in essential nutrients and minerals.
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