
Mushrooms in lawns can be unsightly and even dangerous, especially if you have children or pets. While mushrooms are beneficial to lawns as they help break down organic matter and return nutrients to the soil, they can be toxic and cause anything from mild gastrointestinal distress to death. If you want to get rid of mushrooms, you must attack the entire mushroom and remove it from the ground as soon as you see the caps appear. Simply plucking or mowing over them will not kill them and will heighten the chances of them spreading spores across your lawn. To prevent mushrooms from growing, you can treat your lawn with a fungicide, apply a nitrogen fertilizer to deter mushrooms from growing in organic matter, or remove any decaying matter that mushrooms feed off.
| Characteristics | Values |
|---|---|
| Cause | Low light, high soil moisture, decomposing organic matter |
| Solution | Address moisture issues, trim trees to allow more light, remove decomposing matter, use nitrogen fertilizer, use vinegar solution, use baking soda, use soap and water solution, use fungicide |
| Precautions | Do not mow or rake over mushrooms as this can spread spores, do not dispose of mushrooms in compost, wear protective clothing and eye protection when using vinegar or weed killer |
What You'll Learn

Mushrooms are a type of fungus that grow underground
Mushrooms are a type of fungus that grows underground. They are the fleshy, spore-bearing fruiting bodies of fungi, typically produced above ground on soil or another food source. The standard for the word "mushroom" is the cultivated white button mushroom, Agaricus bisporus. However, the term "mushroom" is also used to describe a variety of other gilled fungi, with or without stems. These include polypores, puffballs, jelly fungi, coral fungi, bracket fungi, stinkhorns, and cup fungi.
Mushrooms grow by breaking down organic matter, such as buried timber, stumps, or tree roots, into nutrients that can be used by the surrounding plants. They reproduce through spores, similar to seeds, which are spread by wind or water to start new fungal colonies. While mushrooms can be beneficial to lawns, they can also be a nuisance, especially if they are toxic species.
If you want to kill mushrooms, you must remove them from the ground as soon as you see the caps appear. Simply plucking them will not work, as the mushroom is typically much larger beneath the surface. You can try mowing or raking over them, but this may increase the chances of them spreading spores. Applying a nitrogen fertilizer can help deter mushrooms by quickening the decomposition of organic matter, leaving the mushrooms with nothing to feed off of. Additionally, you can mix vinegar with water and spray it on the affected area, or use soap and water to kill the mushrooms.
To prevent mushrooms from growing, remove any decaying materials, improve drainage, and increase sunlight to your lawn if possible. Address any moisture issues and trim trees to allow more light to reach the grass. By removing the conditions that favour mushroom growth, you can reduce the likelihood of them appearing in your lawn.
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They thrive in damp, shaded areas with decaying organic matter to feed off
Mushrooms are part of a fungus that grows underground. They are often an indicator of a larger fungus hidden from sight. Mushrooms thrive in damp, shaded areas with decaying organic matter to feed off.
Fungi, including mushrooms, feed on decaying organic matter. This could be buried timber, a stump, or tree or shrub roots that remain underground after plants have been removed. Mushrooms can also feed on grass clippings, pet waste, and other decomposing matter. They can be toxic to people and pets, so it is important to remove them from your yard.
To prevent mushrooms from growing, you can remove their food source by keeping your lawn clear of decomposing matter. Regular yard clean-up can help deter mushroom growth. You can also improve drainage in your yard and increase the amount of sunlight it receives. Pruning branches on trees or bushes that provide shade can also help.
If you want to kill existing mushrooms, you can remove them manually by digging them up with a trowel or shovel and putting them into a bag to prevent the spread of spores. However, simply plucking mushrooms may not be effective as they have a larger structure beneath the surface. You can also apply a nitrogen fertilizer to deter mushrooms from growing in organic matter. The fertilizer will quicken the decomposition of the matter, leaving the mushrooms nothing to feed off of.
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Mushrooms can be poisonous to children and pets
Mushrooms can be poisonous to both children and pets. If you have children or pets, it is essential to be vigilant about mushrooms growing in your yard. While most mushrooms are beneficial to lawns, some species can be toxic.
For children, the risk of poisoning can be mitigated by teaching them not to put mushrooms in their mouths and by supervising them when they are playing outdoors. If a child does ingest a mushroom, seek medical attention immediately. Bring a specimen of the mushroom or take a picture of it, including the gills, cap, stem, and surrounding area, to help with identification.
For pets, the best way to prevent mushroom poisoning is to keep them away from areas where mushrooms could be growing and to supervise them when they are outside. If you suspect your pet has ingested a mushroom, contact your veterinarian or a poison control centre immediately. Again, bringing a specimen or taking a picture of the mushroom can be helpful for identification.
Some common signs of mushroom toxicity in pets include vomiting, diarrhoea, weakness, lethargy, jaundice, nausea, increased drinking and urination, dehydration, and in severe cases, liver or kidney failure, and even death. The specific symptoms and severity depend on the mushroom species and the amount ingested.
To prevent the growth of mushrooms in your yard, you can remove decaying materials, improve drainage, aerate your soil, and increase sunlight exposure.
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Scotts Weed and Feed is not formulated to kill mushrooms
Weed control products, like Scotts Weed and Feed, are designed to target specific types of weeds and inhibit their growth. They contain carefully selected herbicides that interfere with the growth and development of unwanted plants. However, these herbicides are not formulated to affect the unique biology of fungi, which have very different life cycles and growth patterns compared to plants.
Fungicides, on the other hand, are specifically created to combat fungal growth. They contain active ingredients that interfere with the life cycle and metabolic processes unique to fungi. When dealing with mushrooms in your lawn, it is essential to understand that they are the fruiting bodies of an extensive underground network. Simply removing the visible mushrooms is often insufficient, as the fungus will continue to thrive and produce more mushrooms.
Fungicides are designed to penetrate the soil and target the root systems of fungi, preventing spore germination and disrupting their growth. By applying a suitable fungicide, you can effectively control the fungal population in your lawn. It is important to note that different types of fungi may respond differently to specific fungicides, so choosing the right product is crucial. Consulting with a lawn care professional or gardening expert can help you select the most effective fungicide for your specific mushroom problem.
Additionally, addressing the environmental conditions that favour mushroom growth is essential for long-term prevention. Mushrooms thrive in moist, shaded areas with an abundance of decaying organic matter to feed on. By improving drainage, increasing sunlight, and regularly removing decomposing leaves, branches, and other organic debris, you can make your lawn less conducive to fungal growth. Combining targeted fungicide applications with environmental modifications will provide a comprehensive approach to managing and preventing mushroom infestations in your lawn, without relying on products like Scotts Weed and Feed, which are not designed for this specific purpose.
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To kill mushrooms, use a fungicide or a natural vinegar solution
Mushrooms in your lawn can be unsightly and potentially dangerous if you have children or pets. While they are a sign of healthy soil, you may want to get rid of them. Mushrooms are the "fruiting" body of a larger fungus that grows underground. Simply plucking mushrooms does not kill them, but there are several methods you can use to address a mushroom problem.
One way to kill mushrooms is to use a fungicide. However, this is not always effective because it does not attack the fungus growing beneath the soil. As a result, the mushrooms may keep coming back. Additionally, fungicides can ruin your soil biota. Therefore, it is more effective to take preventative measures, such as removing decaying materials and increasing sunlight, to make your lawn less suitable for fungi to grow.
Another option is to use a natural vinegar solution. Vinegar contains acetic acid, which is effective at killing mushrooms. To make the solution, mix one part vinegar with four parts water in a spray bottle. When spraying the solution, be careful to only apply it to the mushrooms, as vinegar can kill plants and grass. This method will kill the mushrooms, but it will also kill anything else it comes into contact with.
Alternatively, you can try using a mixture of dish soap and water. Combine one to two tablespoons of dish soap with three gallons of water and pour the solution over the mushrooms. Make sure to aerate the area around them first so that the water drains well. This method changes the pH level in the soil, but be cautious as too much soap can tip the pH balance in the wrong direction and grass will not grow in high pH soil.
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Frequently asked questions
Scotts Weed and Feed is a product that combines a weed killer with lawn fertiliser.
Scotts Weed and Feed is not formulated to kill mushrooms or other fungi. However, there are several ways to prevent and kill mushrooms, including:
- Removing their food source, such as decaying matter, buried timber, and tree stumps.
- Increasing sunlight and improving drainage in the area.
- Applying nitrogen fertiliser to speed up the decomposition of food sources.
- Using a fungicide to kill the fungus that started the mushroom growth.
Some alternatives to Scotts Weed and Feed for killing mushrooms include:
- Ortho Killex: a weed killer that targets broadleaf weeds.
- Baking soda: raising the pH level of the soil, which mushrooms do not like.
- Vinegar: mixing 5 tablespoons with 1 gallon of water and spraying the solution on the mushrooms.

