Black Spots On Siding From Mulch

Plant a low maintenance groundcover in the area instead of using mulch.

Black spots on siding from mulch.

You have to scrape them off and they leave behind a stain that is almost impossible to remove. 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. They are raised hard bumps. Others have said it s a fungus from mulch.

What are these black spots on your house siding. The artillery fungus is a white rotting wood decay fungus that likes to live on moist landscape mulch. Replace wood mulch with landscape fabric and small stones. Davis of penn state.

The black tar like spots that are all over your vinyl siding are more than likely a fungus called sphaerobolus stellatus better known as artillery or shotgun fungus. Artillery fungus is a wood dwelling fungus commonly found in mulch. Add a fresh layer of mulch. It s sometimes referred to as shotgun fungus due to the shotgun like pattern of black specks all.

Some tell us it s from spiders. This will buy you a year before the fungus reaches to the top of the new mulch.