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You can get rid of mushroom fungus by removing the visible growth, fixing the moisture problem that allowed it to thrive, and applying the right treatment to the affected area.
If you’re dealing with mushrooms popping up in your lawn, garden, or even inside your home, getting rid of mushroom fungus effectively means more than just plucking the caps off the surface.
The fungus itself lives deep in the soil or wood, so if you don’t address the root cause, those mushrooms will keep coming back no matter how many you pull.
In this post, we’ll explore how to get rid of mushroom fungus both indoors and outdoors, why these fungi appear in the first place, and the best prevention strategies to keep them gone for good.
Let’s dig in.
Why Mushroom Fungus Appears in Your Space
Before you can get rid of mushroom fungus, you need to understand exactly why it’s showing up in your home or yard.
Mushroom fungus thrives in damp, shaded, and organic-rich environments, which is why you’ll often spot them after heavy rain or in poorly ventilated rooms.
1. Excess Moisture Is the Main Culprit
The number one reason mushroom fungus appears is moisture that lingers for too long.
Whether it’s a leaky pipe under your sink, a damp basement corner, or a lawn that doesn’t drain well, standing water creates the perfect breeding ground.
Mushroom fungus needs consistent humidity to spread its network of tiny threads, called mycelium, which then produces the mushrooms you see above ground.
So when you’re figuring out how to get rid of mushroom fungus, your first priority should always be locating and eliminating the water source.
2. Organic Matter Provides the Food Source
Mushroom fungus feeds on decomposing organic material like dead tree roots, old mulch, wood scraps, or even cardboard left in a damp area.
If these materials are buried in your soil or hidden behind a wall, the fungus will happily feast on them and produce mushrooms.
To get rid of mushroom fungus for good, you often have to remove the food source that’s sustaining the fungal colony underground.
How to Get Rid of Mushroom Fungus Outdoors
For lawns, gardens, and flower beds, getting rid of mushroom fungus requires a combination of physical removal and environmental changes.
Here’s a step-by-step approach that actually works.
1. Remove the Mushrooms by Hand
The quickest way to get rid of mushroom fungus visually is to pick the mushrooms and dispose of them properly.
Wear gloves and pull each mushroom out from the base, then place them in a sealed bag before throwing them away.
Avoid composting them, as the spores can survive and reinfect your garden later.
While hand removal won’t kill the underground mycelium, it prevents the mushroom fungus from releasing new spores and spreading further.
2. Dig Out the Underlying Mycelium
To get rid of mushroom fungus at the source, you need to excavate the area where the mushrooms are clustering.
Use a shovel to remove the top four to six inches of soil, along with any rotting wood, roots, or mulch you find beneath.
This physical removal cuts out a large portion of the active fungus network and reduces the chances of regrowth.
Replace the removed soil with fresh, well-draining topsoil to give your lawn a clean start.
3. Improve Drainage and Reduce Shade
Since mushroom fungus loves wet, shadowy spots, you can make your yard less inviting by improving airflow and sunlight exposure.
Aerate your lawn to break up compacted soil, which allows water to drain away instead of pooling on the surface.
Trim back overhanging tree branches and bushes so more sunlight reaches the affected area.
Drier, brighter conditions make it much harder for mushroom fungus to survive and return.
How to Get Rid of Mushroom Fungus Indoors
Finding mushrooms growing inside your house is more serious, since it usually indicates a hidden moisture problem.
Here’s how to get rid of mushroom fungus indoors safely and thoroughly.
1. Fix the Leak or Humidity Issue Immediately
Indoor mushroom fungus cannot exist without a persistent moisture source, so locate the leak or condensation problem right away.
Check under sinks, behind appliances, and around windows for damp spots or drip marks.
If the issue is high humidity, like in a bathroom or basement, use a dehumidifier to drop the moisture level below 50 percent.
Once you dry out the environment, the mushroom fungus will lose its ability to grow, and existing mushrooms will wither.
2. Remove Contaminated Materials
Mushroom fungus often grows on wood, drywall, or insulation that has absorbed water.
You cannot simply clean these porous surfaces, so you’ll need to cut out and replace the affected sections.
Wear a mask and gloves while doing this to avoid inhaling spores.
Bag the removed materials tightly and dispose of them outside.
This step is essential if you want to get rid of mushroom fungus completely, because the fungus can survive inside wooden studs or floorboards for years.
3. Apply a Fungicide Solution
After removing the visible growth and contaminated material, treat the area with a commercial fungicide or a natural solution.
A mixture of one part white vinegar to three parts water works well on hard surfaces and doesn’t leave harmful residues.
For tougher infestations, use a borax solution by dissolving one cup of borax in a gallon of hot water.
Apply either solution generously, let it dry, and then wipe down the area.
This helps kill any remaining mushroom fungus spores that might try to recolonize.
Natural Ways to Get Rid of Mushroom Fungus
If you prefer eco-friendly methods, several natural remedies can help you get rid of mushroom fungus without harsh chemicals.
Here are some effective options.
1. Use Baking Soda as a Drying Agent
Baking soda raises the pH level on the surface, which is unfavorable for mushroom fungus growth.
Dissolve two tablespoons of baking soda into a quart of warm water and pour it over the affected outdoor area.
For indoor use, spray this mixture onto non-porous surfaces and let it air dry.
Repeat this treatment every few days until the mushrooms stop appearing.
2. Spread Nitrogen-Rich Fertilizer on Lawns
Mushroom fungus thrives in nutrient-poor, acidic soil, so adding nitrogen-rich fertilizer changes the conditions.
Apply a balanced lawn fertilizer with a high nitrogen content to speed up decomposition of the organic matter the fungus feeds on.
As the organic material breaks down faster, the mushroom fungus loses its food source and gradually dies off.
Preventing Mushroom Fungus from Returning
Once you’ve dealt with the current infestation, the real goal is keeping mushroom fungus away permanently.
Here’s what to do.
1. Keep Your Yard Clean and Dry
Remove fallen leaves, dead branches, and grass clippings regularly so the mushroom fungus doesn’t have rotting material to feed on.
Water your lawn deeply but infrequently, preferably in the morning, so the topsoil dries out during the day.
This simple routine makes your yard much less hospitable to future fungal growth.
2. Ventilate Indoor Spaces Properly
Indoor mushroom fungus prevention is all about controlling airflow and humidity.
Use exhaust fans in bathrooms and kitchens, and open windows periodically to reduce condensation.
Check your crawl spaces and attic for any signs of dampness at least twice a year.
Catching a moisture issue early can help you get rid of mushroom fungus before it ever becomes a visible problem.
3. Choose Resistant Mulch and Soil
If mushrooms keep appearing in your flower beds, switch from wood-based mulch to cedar or rubber mulch.
These materials are far less appealing to mushroom fungus because they decompose slowly and resist moisture retention.
Also, consider improving your soil’s drainage by mixing in sand or perlite to prevent water from pooling around plant roots.
So, How Do You Get Rid of Mushroom Fungus?
You can get rid of mushroom fungus by targeting both the visible mushrooms and the hidden mycelium network that produces them.
It all starts with removing the mushrooms by hand, digging out contaminated soil or materials, and fixing the moisture problem that invited the fungus in.
For outdoor areas, improve drainage, increase sunlight, and treat the soil with baking soda or nitrogen-rich fertilizer.
For indoor spaces, fix leaks, lower humidity, and replace any water-damaged wood or drywall.
And once the mushroom fungus is gone, stay vigilant by keeping your environment dry, clean, and well-ventilated so it doesn’t make an unwelcome comeback.
Now that you know exactly how to get rid of mushroom fungus, you can tackle the problem head-on and enjoy a cleaner, healthier home and yard.