Sometimes I get mold on top of my mulch. What is it and is it harmful?

This is known as myxomycetes or slime mold. These molds live in moist places on decaying wood, leaves or other organic matter retaining abundant moisture. The same type of organism is often seen in the woods on decaying logs. It can be strikingly colorful in yellow, orange or red. It can easily be disposed of by turning it over. This mold is not known to be harmful to plants or animals.

 
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