Here is a photo of what the actual fungus that produces the black spores.
Black spots on vinyl siding mulch.
It goes all the way up to my second story windows and is even under my soffit and on my gutters.
Add a fresh layer of mulch.
Others have said it s a fungus from mulch.
Here is what the spores look like on the vinyl siding.
The mulch is being contaminated by artillery fungus also known as sphaeobolus stellatus.
The worst thing about this fungus is that it shoots spores up to 20 feet which often land on siding cars.
Plant a low maintenance groundcover in the area instead of using mulch.
Replace wood mulch with landscape fabric and small stones.
April 30 2019 at 11 07 am edt updated april.
These are microscopic flowers that shoot tar like substance up the 20 feet.
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.
Artillery fungus black tar spots on houses artillery fungus seeing black tar spots on the sides of your house or vehicles.
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 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 artillery fungus or shotgun fungus is a wood decay fungus that likes to live on moist landscape mulch.
This is damaging your siding.
The spots are about the size of the head of a pin and appear to be black or dark brown in color.
Use big pieces of pine bark or other bark mulch which are a less hospitable place for the fungus.
Some tell us it s from spiders.
Black spots on car house could be from a mulch fungus you may have seen these little spots and there s a weird explanation for how they got there.
By sandy feather penn state extension.
I am getting small dark spots on windows and the white siding of my house.
This will buy you a year before the fungus reaches to the top of the new mulch.
We have thousands of tiny black spots pin head size all over the siding of our house.
It s on the porch my windows but it is worse on the siding.
