Fungus in wood mulch

Asked July 11, 2017, 12:58 PM EDT

Found several black spots in mulch in landscaping by some evergreen shrubs. When you move it a powdery residue (smoke-like) raises up. I did aerate it a little but would like to know what it is, how to get rid of it and how to prevent it coming back. Thank you

Carver County Minnesota

1 Response

It is probably some fungal growth which is part of the wood chips' decaying process, a natural and harmless phenomenon. I wouldn't do anything. Unfortunately, fungi come with the territory if you use organic mulches. Read here: