Black Spots On Siding From Mulch

Some tell us it s from spiders.

Black spots on siding from mulch.

Davis of penn state. It s sometimes referred to as shotgun fungus due to the shotgun like pattern of black specks all. Others have said it s a fungus from mulch. Artillery fungus is a wood dwelling fungus commonly found in mulch.

The artillery fungus is a white rotting wood decay fungus that likes to live on moist landscape mulch. 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. This will buy you a year before the fungus reaches to the top of the new 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. 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. 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. What are these black spots on your house siding.

They are raised hard bumps. Add a fresh layer of mulch.