Soapy water for grass fungus – protect your lawn

We’ve all been there before where you’re happily walking across your gorgeous lawn only to find some unsightly fungi growing out of it. Not only are mushrooms growing out of your lawn a bit of an ugly sight to behold, but fungi such as toadstools are also poisonous and can pose a threat to small children and pets. So that begs the question… Does soapy water kill lawn fungus? Let’s find out:


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Soapy water for grass fungus

Soapy water for grass fungus is an excellent way to kill fungus. In order to create the soapy water solution, mix 2 tablespoons of dish soap (I recommend dawn dish soap) with a gallon of water inside of a bucket. Once you have mixed the solution together, pour it over the affected area of your lawn. The dish soap in the soapy water will work to break down the fungi’s cell walls and kill them. Apply this twice daily until you can see the fungi starting to die off.

how effective dish soap

Does dish soap kill lawn fungus?

Yes, dish soap can kill lawn fungus. Dish soap contains chemicals known as surfactants which work to break down the fungi’s cell walls, dries it out and ultimately kill it. You will need to be mindful of overusing it onto your grass as you could end up damaging your lawn.

Think of it like this, dish soap will kill most plants that it comes into contact with, so too much of it can also kill your lawn. So use it sparingly and only apply it to the affected areas for best results.

When applying dish soap to your lawn, be sure to avoid getting any on your plants or flowers as it will likely harm and kill them. Also, take care not to let the soapy water run off into gutters or storm drains as this can pollute local waterways.

How to use soapy water for lawn fungus

Follow the steps below to efficiently get rid of lawn fungi, such as mushrooms and toadstools, using soapy water:

  1. 2 tablespoons of dish-soap detergent and a gallon of water should be combined.
  2. Aerate the soil adjacent to where mushrooms or fungi are growing. If you don’t have a pair of aerating shoes, running spikes golf shoes or a screwdriver will work just as well. The holes should be around six inches deep and 12-inches apart.
  3. Spray the soap dish detergent solution on the fungus-infected areas and aerated regions which are around the fungi.
  4. Do steps one-three below twice a day for roughly a week to get rid of all fungi from your lawn completely.
Are you worried about soapy water killing your lawn grass? Have a read of this article which may make things easier for you
fungal disease

Is laundry detergent an effective lawn fungus treatment?

Laundry detergent is effective at killing lawn fungus, however, the downside to using it is that you run the risk of killing your grass in the process. Surfactants are one of the key ingredients found in dish soap/ laundry detergents, and it’s these that make oil and dirt water-soluble. The surfactants are not choosey about what they kill, which could mean that your grass will be killed when they come into contact with it.

On the other side of the coin, you have Insecticidal soap that doesn’t contain any of these surfactants. Insecticidal soaps use a combination of natural oils and fats along with an alkali (commonly sodium hydroxide). The downside is they don’t kill fungi and will just ruin your lawn’s natural ecosystem by killing helpful insects.

Laundry soap gets rid of mushrooms and other fungi by destroying the hyphae so that mycelium can’t grow. However, it’s better to use a gentle dish soap rather than a powerful laundry detergent, since the latter will cause more noticeable damage to your desired turfgrass.

Want to learn about using dawn dish soap to stop deer from entering your yard? I wrote a great article which covers this in detail.

common lawn fungal diseases


so we can see that soapy water is an effective way to kill lawn fungus. Just be sure to use it sparingly and only on the affected areas to avoid damaging your lawn. Let’s summarise:

  • Soapy water is an effective way to kill fungi growing on your grass
  • To make the solution, combine 2 tablespoons of dish soap with a gallon of water in a bucket
  • The dish soap will help to break down the fungi’s cell walls which will ultimately kill it.
  • Apply the solution twice daily for 1 week for optimum results
  • Surfactants are one of the main ingredients in dish soap which helps break down the fungi
  • Avoid getting the dish soap solution on large areas of grass or flowers
  • Soapy water is effective in killing mushrooms and toadstools
such lawn fungus

People also ask

Can I use Dawn dish soap on my lawn?

Yes, dawn dish soap will eliminate grass in a concentrated form. Dish soap or dishwashing liquid is made up of chemicals that are intended to remove grease and food residue from dishes. The vast majority of “soaps” available on the market today are detergents or synthetic chemical compounds designed to break down fats and oils.

Does soap and water get rid of fungus?

Soapy water is an effective way to kill fungi growing on your grass. To make the solution, combine 2 tablespoons of dish soap with a gallon of water in a bucket.

How does baking soda cure grass fungus?

Baking soda is an effective way to kill grass fungus because it’s a natural fungicide. The baking soda will change the pH of the soil and make it uninhabitable for fungi.

dead grass fungi treated by baking soda

Will lawn fungus go away on its own?

Lawn fungi can often go away on their own if the environment is not conducive to their growth. For example, if the pH of the soil is off or there’s not enough moisture, fungi will likely die off. However, in some cases, fungi can become resistant to changes in their environment and will continue to grow.

Can I use vinegar to kill grass fungus?

Yes, vinegar is an effective way to kill grass fungus. Vinegar is a natural fungicide and will change the pH of the soil, making it uninhabitable for fungi. To make a solution, mix 1 part vinegar with 3 parts water in a spray bottle. Apply the solution to the affected area and let it sit for at least 30 minutes before rinsing.

What are the symptoms of lawn fungus?

The most common symptom of lawn fungus is yellow or brown patches on the grass. These patches can be circular or irregular in shape and are often surrounded by green, healthy-looking grass. Other symptoms include mushrooms or toadstools growing on the lawn, and grass that appears wilted or dead.

patchy lawn from fungus

How do I get rid of lawn fungus?

There are a few different ways to get rid of lawn fungus. You can try using soapy water, vinegar, or baking soda. You can also use a fungicide from your local garden center. If you have a severe infestation, you may need to contact a professional Lawn care company.

When should I apply fungicide to my lawn?

Fungicide should be applied when the grass is actively growing and the temperature is above 60 degrees Fahrenheit.

Should I water my grass if it has fungus?

Water your lawn only when necessary, and avoid over-watering, as this can promote the growth of fungi. Water early in the day so the grass has time to dry out before nightfall.

watering lawn

Why does my lawn keep getting fungus?

There are a few reasons why your lawn might keep getting fungus. One reason could be that the environment is conducive to fungi growth. This means the pH of the soil is off or there’s too much moisture. Another reason could be that you’re not applying enough fungicide, or you’re not applying it correctly.

How often should I treat my lawn for fungus?

You should treat your lawn for fungus every 2-3 weeks during the growing season.

What time of year does grass fungus grow?

Grass fungus can grow at any time of year, but it’s more common in the spring and fall.

fungus grows in spring and fall

Will grass come back after fungus?

The grass will generally grow back, but the process may take a few weeks. The spores causing the fungus will stay in the ground forever, and there is no way to get rid of them from your lawn. They’re not “transferred” by stepping on them or mower tires; rather they exist already in most lawns.

Can a lawn mower spread fungus?

No, a lawn mower cannot spread fungus. The spores that cause fungi are already present in most lawns and don’t need to be transferred by a lawn mower.

Does fungicide prevent fungus?

Fungicide won’t prevent fungi from growing on your lawn, but it will help to control the growth of existing fungi. Be sure to apply fungicide every 2-3 weeks during the growing season.

Should you water lawn after applying fungicide?

No, you should not water your lawn after applying fungicide. Watering will only dilute the fungicide and make it less effective.

fungicide and watering
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Oliver Wright
Oliver Wright

I hope you enjoy reading some of the content and ideas from this site, I tend to share articles and product reviews on a daily basis, so be rest assured… you won’t run out of things to read!

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