Artillery fungus is one possible explanation. This mulch-associated fungus produces sticky spore masses that land on nearby surfaces. Identifying the source matters because washing the house and addressing the surrounding landscape involve different steps.
For Raleigh homeowners, the most useful approach starts with observation. Look at the shape of the spots, their location, the surrounding mulch, and the condition of your siding. Those details help you ask better questions before attempting removal or scheduling professional house washing.
What Is Artillery Fungus?
Artillery fungus refers to fungi in the genus Sphaerobolus. Penn State Extension describes tiny cup-shaped fruiting bodies growing in landscape mulch. These structures eject dark, sticky spore masses toward bright surfaces, including light-colored buildings and vehicles.
The material attached to your siding is a deposited spore mass. The fungus producing those deposits lives in the nearby organic material. Looking at the wall alone therefore gives you only part of the picture.
A white garage door, pale siding, or light-colored window trim makes the specks especially noticeable. Their scattered appearance often leads homeowners to mistake them for road tar or dirt. Penn State Extension also explains that the deposits adhere strongly and present removal challenges. Learn more about fungi in landscape mulch.
Why Raleigh Homeowners Should Inspect Nearby Mulch
A mulched planting bed beside the house provides a useful starting point when investigating unexplained black specks. Raleigh properties differ in their landscaping, shade, drainage, and exterior materials. Your own planting beds matter more than your neighborhood name when assessing a possible source.
For example, a homeowner in North Raleigh might notice spots above a mulched foundation bed. A homeowner in Brier Creek might find similar marks near a garage entrance. These are examples of where to inspect, rather than evidence of higher fungus activity in either neighborhood.
Walk around your property and compare affected and unaffected walls. Does the spotting appear above wood-based mulch? Do the same dots occur on nearby trim, planters, or outdoor furniture? Has the appearance changed since a landscaping project?
Record your observations before changing the beds. A few photographs of the wall and adjacent landscaping help a cleaning professional or landscape adviser understand the situation. Our Raleigh pressure washing service page provides an overview of the exterior surfaces Triangle Power Wash serves locally.
How to Recognize Possible Artillery Fungus Spots
NC State Extension identifies artillery fungus deposits as circular, dark, raised specks on surfaces such as walls, windows, cars, and leaves. Its gardening handbook also explains that removing a speck sometimes leaves a persistent stain. Review NC State Extension’s description.
Look closely without scraping. A phone camera with a close-focus setting offers a practical way to document the texture. Take one picture showing an individual spot and another showing the wider pattern across the wall.
Compare several dots. Are they distinct, rounded deposits, or part of a broad film? Are the marks concentrated beside a planting bed? Do nearby surfaces show the same pattern?
These observations support an assessment, but a photograph alone does not confirm every dark spot as artillery fungus. Paint overspray, insect-related deposits, and other contaminants also deserve consideration. Share any recent painting, driveway work, or landscaping changes when requesting advice.
Artillery Fungus Versus Ordinary Dirt
The first question is whether you are looking at deposited particles, a stain, or general surface buildup. Each category calls for a different evaluation.
Think about when you first noticed the marks. If spotting appeared immediately after work near the house, mention that event to your cleaning professional. If the dots occur above a mulched bed with no recent construction, include photographs of the bed.
Avoid deciding based on color alone. A dark mark does not identify the material responsible. Shape, texture, distribution, and the surrounding setting provide a more useful record.
Describe the problem specifically when scheduling service. “Raised black dots above the front planting bed” gives more information than “dirty siding.” The clearer your description, the easier the conversation about suitable cleaning methods and expected results.
Artillery Fungus Versus Broader Siding Discoloration
Your home might have more than one exterior cleaning issue at the same time. A broad area of discoloration and scattered raised black dots should receive separate attention during the assessment.
Ask your contractor to distinguish general buildup from individual deposits. A quote for routine house washing should explain whether spot treatment forms part of the work, whether testing is necessary, and which marks are likely to persist.
Our article on why siding looks dirty discusses broader exterior staining. This article focuses on a narrower question: what to do when tiny, attached black specks appear near your landscaping.
Separating these questions helps you evaluate results fairly. Cleaner siding around stubborn dots does not establish that the dots were ordinary dirt. A successful general wash and unresolved individual stains are separate outcomes.
