
Mushrooms are a common occurrence in lawns and gardens, but they can be a nuisance, an eyesore, and even dangerous for pets and children. While mushrooms are a sign of healthy soil, they can also indicate the presence of poisonous fungi. The growth of mushrooms is influenced by various factors, including moisture, shade, organic material in the soil, and drainage conditions. To eliminate mushrooms from your lawn, several methods can be employed, such as hand-picking, using commercial fungicides, improving drainage, and reducing shade and moisture levels. However, it is important to note that killing mushrooms may also harm the surrounding grass and disrupt the ecosystem. Therefore, prevention and control measures, such as proper lawn care and supervision of pets and children, are often the best approach to managing mushroom growth.
| Characteristics | Values |
|---|---|
| Cause | Mushrooms are caused by high moisture, rich organic matter in the soil, and low light. |
| Prevention | Decrease shade, avoid compacted soil, dethatch the lawn, and improve drainage. |
| Removal | Pluck and dispose of mushrooms, use dish soap or baking soda, or apply fungicide/herbicide. |
| Notes | Mushrooms are usually harmless and beneficial to the ecosystem, but some may be poisonous, especially to pets and children. |
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What You'll Learn

Sunlight and shade
Mushrooms thrive in damp, dark environments, where they break down organic matter. They are the reproductive part of fungi that live in the soil. Mushrooms spread spores into the air and then disappear when the sun comes out or the soil dries up.
While mushrooms are usually decomposers, they can be poisonous to pets and are often considered a nuisance when they appear in gardens and yards. If you are concerned about mushrooms growing in your yard, you can take steps to decrease shade in problem areas. Mushrooms like shade, so trimming back or thinning out branches on nearby trees or shrubs can help keep them in check.
However, it is important to note that mushrooms themselves are not a problem. They help break down organic material and make the soil more productive. In fact, mushrooms are a sign of healthy soil. Nevertheless, if you want to prevent their growth, you can also try aerating your lawn to improve drainage and decrease the moisture that encourages mushrooms.
If you are concerned about the toxicity of mushrooms in your yard, it is best to consult a local lawn care specialist or use an expert-informed identification service to distinguish between harmless and dangerous mushrooms.
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Soil compaction
Mushrooms are fungi, or rather, the reproductive part of fungi that live in the soil. They thrive in damp, dark environments, breaking down organic matter in lawns and yards. Mushrooms spread spores into the air and then disappear when the sun comes out or the soil dries up.
In addition to aeration, you can take other measures to address soil compaction and deter mushroom growth. Firstly, trim back or thin out branches on nearby trees or shrubs to reduce shade, as mushrooms favour shaded areas. Secondly, minimise debris such as old trees, leaves, and pet waste, as these can contribute to soil compaction and provide organic material for mushrooms to feed on.
If you have a lawn, dethatching can also help prevent mushroom growth. Excess thatch, which is organic material that absorbs moisture, can act as a breeding ground for mushrooms. By dethatching and aerating your lawn, you can reduce the moisture retention and organic matter that mushrooms thrive on.
By addressing soil compaction through aeration, shade reduction, debris removal, and dethatching, you can create an environment less conducive to mushroom growth. These preventative measures are often more effective than reactive measures, as it can be challenging to eliminate mushroom spores completely once they have established themselves in the soil.
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Organic material
Mushrooms thrive in moist, dark environments with decaying organic material. They break down this organic material, depositing nutrients into the soil and helping it retain water. If you want to prevent mushrooms from growing, avoid creating these conditions in your garden.
To prevent the accumulation of organic material, avoid spreading compost or mulch over your lawn. Keep your lawn dry by lowering your watering frequency and always watering in the morning so that the water has time to dry.
If mushrooms do appear, it is important to act quickly. Mushrooms will release spores, which will lead to more mushrooms. Remove the mushrooms from the ground as soon as you see them by plucking, cutting, or mowing over them. Dispose of the mushrooms in a plastic bag, tying it up tightly before discarding it in the trash.
To kill mushroom spores, you can use certain chemicals such as bleach, hydrogen peroxide, salt, vinegar, or baking soda. High temperatures above 140°F, UV light, and low humidity can also kill spores.
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Drainage
Mushrooms thrive in damp, dark environments, breaking down organic matter in your lawn or yard. They can be a nuisance and a source of concern if you have children or pets, especially if they are toxic. Mushrooms are also considered unsightly, especially if you are preparing to sell your property.
To prevent mushrooms from growing, you can fix your lawn's poor drainage. If your lawn holds too much water, you will need to improve drainage. Here are some ways to do this:
- If water is flowing down a slope, build up the soil to redirect excess water to a more desirable location.
- Add a pond or water garden to catch excess water and prevent flooding.
- Place rain barrels beneath waterspouts to collect excess water during storms and prevent it from soaking into your lawn.
- Consider adding an underground drain, such as a French drain (an underground ditch filled with gravel), to help disperse water and prevent it from becoming stagnant.
- Aerate your lawn to improve drainage and decrease the moisture that encourages mushrooms.
- If you have heavy clay soil, add sand to aid with drainage.
- Dethatch your lawn to help with drainage and keep mushrooms away.
- Remove decaying organic matter, such as old trees and pet waste, from your lawn to hinder mushroom growth.
It is important to note that simply plucking mushrooms may not kill them, as they often have a larger structure beneath the surface. However, removing them before they release spores can help prevent further growth.
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Fungicide
Mushrooms are the reproductive part of fungi that live in the soil. They spread by dropping spores into the air and reproducing where they land. Mushrooms thrive in damp, dark environments, breaking down organic matter in your lawn and yard. They are an indication of good soil quality, but they may be harmful to pets and children.
If you are still considering using a fungicide, you can try a commercial product or a DIY mixture. DIY fungicides may include ingredients like soap, water, vinegar, or baking soda. When using baking soda, mix 1-2 tablespoons with 3 gallons of water and pour the mixture over the mushrooms, aerating the area around them first to aid drainage. However, be cautious, as too much baking soda will tip the pH balance, and grass will not grow in high pH soil.
Instead of using fungicides, you can try other methods to prevent and remove mushrooms. For example, you can remove mushrooms by hand, rake them away after mowing, or mow over them. You can also address the conditions that encourage mushrooms, such as high moisture, low light, and compacted soil. To reduce moisture, you can aerate your lawn to improve drainage and reduce standing water. You can also address low light by trimming back branches on nearby trees and shrubs to let in more sunlight. Finally, to deal with compacted soil, you can dethatch your lawn, as a thick layer of thatch can contribute to drainage issues.
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Frequently asked questions
Mushrooms thrive in damp, dark environments. Removing their preferred conditions can prevent them from growing. You can do this by increasing sunlight and improving drainage in your yard. Raking mushrooms away and removing debris like old trees and leaves can also help.
Baking soda and lime can be used to raise soil pH and make it less habitable for mushrooms. Dish soap can also be agitated in water and poured onto mushrooms to change the pH level in the soil.
Commercial fungicides or fungus-killing herbicides can be used to kill mushrooms. However, these products can be toxic, especially if you have pets or children. They are also only effective at killing the fruiting part of the fungi.
Aim for deep, infrequent lawn watering to avoid over-moistening the soil. You can also aerate your lawn to improve drainage and decrease shade in problem areas by trimming nearby trees and shrubs.
Mushrooms are not inherently harmful and are a sign of healthy soil. However, some mushrooms may be poisonous, especially to pets. If you are concerned, you can break off the mushrooms or mow over them and dispose of the pieces.

























