Black Spots On Siding From Mulch

If you notice lots of tiny black or dark brown spots developing on your siding above a landscaped area of your yard as seen below it is most likely artillery otherwise known as shotgun fungus.

Black spots on siding from mulch.

Some tell us it s from spiders. The tiny dots are caused by what s called artillery fungus that grows in certain types of mulch. You have to scrape them off and they leave behind a stain that is almost impossible to remove. Add a fresh layer of mulch.

Although it s most often found on the east coast it can grow anywhere and especially thrives in areas that have cool damp springs or rainy fall weather conditions. Artillery fungus is a wood dwelling fungus commonly found in mulch. Others have said it s a fungus from mulch. Plant a low maintenance groundcover in the area instead of using mulch.

It s sometimes referred to as shotgun fungus due to the shotgun like pattern of black specks all. This will buy you a year before the fungus reaches to the top of the new mulch. What are these black spots on your house siding. They are raised hard bumps.

Replace wood mulch with landscape fabric and small stones. The artillery fungus is a white rotting wood decay fungus that likes to live on moist landscape mulch.