Mushroom Growing Under Kitchen Sink | Do This Now!

Have you ever discovered mushrooms growing on your property? Here, our surveyors discuss what causes mushroom development, how to get rid of them on your property, and how to keep them from returning.

Your home’s troubles are not caused by mushrooms; they are only a symptom. If you notice mushrooms growing within your home, water is probably dripping into areas you don’t want it to, leading to mold growth. Mold is almost always present where mushrooms are present.

How to Prevent Mushroom Growth in My Home

It’s usual to find mushrooms growing in homes. It is best to get rid of them if they grow inside your house because they might be harmful to consume and introduce mold. Thankfully, getting rid of mushrooms from your home is relatively straightforward. Mushrooms thrive in humid environments and offer a food source, plenty of oxygen, and the right temperature.

Step 1: Trim the mushrooms off as close to the growing surface as possible. Any tool that can cut through the thick stem of the mushroom, such as a box cutter or putty knife, should be used. Put the mushrooms in a bag and dispose of them.

Step 2: Spray the area where the mushrooms grow with a solution made of one part bleach and three parts warm water. Pour the mixture onto the area and then scrap the surface with a sponge or towel. When doing this, remember to wear a mask and make the environment as well-ventilated as you can.

Step 3: Locate the source of moisture in the area where mushrooms are growing. For instance, if the bathroom is where the mushrooms are growing, ensure your toilet is securely fastened to the floor. If it isn’t, toilet water may be dripping on or beneath the floor, providing a moisture source for the growth of mushrooms.

The problem might be resolved by replacing the seal surrounding the toilet. In addition, avoid placing wet towels on the floor to keep it as dry as possible. Instead of drying yourself on the floor, stand on a mat after the shower. Keeping things dry might also be aided by running a fan in space.

Why Is My Bathroom Growing Mushrooms?

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Your bathroom should not have mushrooms growing there. Even while many mushrooms are safe to eat on their own, their presence indoors is a symptom of a serious moisture issue that could result in more severe mold infestations.

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Mushrooms are produced by microscopic fungi whose spores are light enough to be carried by even the slightest wind gusts. Spores can be found on plants, clothing, and window screens, but two single-cell spores are needed to start a mushroom from growing.

The environment inside your home typically doesn’t assist mushroom development because mushrooms need low light and high humidity. However, bathrooms are particularly ideal for mushroom germination.

The conditions for mushroom growth on bathroom floors, walls, or even ceilings, particularly near regions where moisture collects or pools, include high heat, excessive humidity, and poor lighting.


Most mushrooms are safe to eat; however, out of an abundance of caution, you should avoid eating any mushrooms that grow in your bathroom. The first worry you may think of is the possibility of toxic mushrooms, but the mushrooms themselves are unlikely to represent a severe risk to your health.

The main threat posed by toilet mushrooms is that they are a symptom of a serious moisture issue that might encourage the formation of black mold or mildew, which are more hazardous. The same conditions that promote mushroom growth also favor mold formation and mildew, and exposure to them increases the risk of severe allergic reactions or respiratory ailments.


It’s all necessary to remove giant mushrooms at first. Put on rubber gloves and pick the troublesome fungi out of the floor, wall, or ceiling. Clean the area with a mix of one-part bleach and three parts water once you’ve removed the mushrooms.

If mushrooms reappear, disinfect the room with a household cleaner containing benzalkonium chloride to eliminate any spores that may still be present, and if required, use a fungicide. Multiple fungicide or bleach solution treatments may be necessary for complete eradication.


It is not sufficient to use a fungicide on the mushrooms already present in your bathroom to avoid future fungal issues. If the humidity in your bathroom is high enough to sustain mushrooms, it’s also likely that it’s high enough to support hazardous mold growth or structural harm to the room’s supporting wood components.

Ensure your bathroom has a ventilation fan installed to eliminate the humidity. Hang towels to dry or throw them right into the washer to avoid creating a haven for mildew and mushrooms with wet towels.

Have a skilled plumber fix the seals around your toilet or bathtub if they leak or collect water. You might need to install new, dry wood floors or walls if the water damage is extensive.

How To Remove Mushrooms From Other Locations 

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The mushrooms you see at home are the fruiting bodies of a little, invisible organism known as mycelium. Collecting them from the ground is similar to selecting apples from a tree. Mycelia are resilient—so resilient that they can sprout in outer space.

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You should take action against the mycelium if you don’t want mushrooms to grow there, although it can be challenging because mycelia can get rather enormous. The armillaria ostoyae mushroom mycelium that grows in the woodlands of eastern Oregon is actually the world’s largest organism.

There are techniques to stop a mycelium system from generating mushrooms in a specific location, like your lawn or a musty closet, even though it might not be realistic to eradicate the system as a whole.

Mushrooms On the Lawn

When left alone, mushrooms are rarely dangerous and contribute beauty to your area. You’re likelier to notice them in a healthy lawn than in one with patchy areas and yellow grass because their presence typically signals fertile soil.

But when there are kids or dogs around, or if there are certain types of wild mushrooms that are hazardous, it is best to remove the mushrooms. Moisture and shade are two elements that mushrooms require to grow. Early spring, when the air is chilly, and the ground moist, is when they are most likely to sprout. In the summer, you may be over watering if you notice them on your grass.

Reduce the quantity and duration of watering, and install drains if there is a drainage issue. It also helps cut back overhanging branches so that sunlight can reach the places you observe.

Mushrooms may permanently be removed by plucking them, but if you don’t know the kind, you should wear gloves. Alternatively, you might use a solution of 1 part white vinegar to 4 parts water to mist any visible mushrooms. You can just wait for the dried mushrooms to rot after doing this to kill them.

Spraying them with a commercial fungicide, which can affect mycelium, is a third choice. You might further disrupt the mycelium by aerating the soil near where mushrooms grow and applying high-nitrogen fertilizer.

The organic stuff that the mycelium feeds on decomposes more quickly, thanks to the fertilizer. Instead of a time-release combination, you need a fast-release one. Spread over 1,000 square feet of lawn at a pace of 1 pound of actual nitrogen.

Household Mushrooms

The first stage in the eradication process is to address the moisture issue. Indoor mushroom growth is a well-known indicator of a moisture issue. It could result from a severe lack of ventilation, a roof leak, or a plumbing leak.

You can be sure that mold is present wherever you observe mushrooms growing from flooring, exposed framing, or another indoor surface. Frequently, it will be noticeable as a blackened area surrounding the mushrooms themselves. This mold will fall dormant, forming mycelium after the moisture issue has been resolved. Even so, it’s crucial to physically remove the mold and mushrooms.

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Spraying bleach solution on visible mold and mushrooms will destroy them, but because bleach has a high surface tension, it won’t penetrate porous materials like wood and kill the spores inside. The EPA suggests using detergent and water to scrub away mold rather than bleach.

Mycelia adhering to the surface will also be eliminated by this procedure. Apply a fungus-killing product with a borate base to the region after scrubbing. Borates can penetrate porous surfaces and destroy spores deep within, unlike bleach. They also stop other spores from colonizing that area.

Is It Dangerous If Black Mold Mushrooms Are Growing Inside The Home?

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The general public refers to a particular genus of fungus called Stachybotrys when they use the term “black mold.” Under the right circumstances, Stachybotrys will develop wet cellulose-based construction materials like sheetrock. When inhaled or consumed, mycotoxins’ off-gassing results in adverse health effects.

Stachybotrys can be harmful whether or not mushrooms are present. However, Stachybotrys, the black mold, rarely results in the growth of mushrooms. If you can see black mold growing within the home, Stachybotrys may not be the problem.

Stachybotrys is typically a slimy, dark mold that appears to have been heavily drawn with black crayons. It can also come in other hues, including grey, blue, and green. It will also have a unique smell, possibly resembling that of an old towel that was left outside.

That doesn’t mean it can’t hurt you just because the mushrooms you’re seeing might not be black mold. No! Many different kinds of mold can harm your health, particularly if you have a damaged immune system.

Bathrooms are one of the rooms in the house where black mold mushrooms appear most frequently. This is because bathrooms are often damp, gloomy spaces where mold will spread more quickly than in other parts of the building.

It is not uncommon to find mold mushrooms growing in a bathroom that is infrequently used and poorly cleaned. The presence of black mold and mushrooms on the bathroom walls may signify a concealed leak.

On the surface, fungi mushrooms growing on bathroom tiles or grout are typically quite simple to remove. Still, they may indicate significant mold mushroom colonies below the tiles.

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