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Does Epsom Salt Kill Fungus Gnats

Does epsom salt kill fungus gnats? Epsom salt is a common ingredient found in many popular home remedies ranging from pores, cleansers and more.

Because it’s one of the most effective home remedies for bugs, many people always wonder whether or not Epsom salt kills fungus gnats. Fungus gnat larvae are tiny and easy to miss, making them a headache when it comes time to tackle this nagging nuisance!

The good news is that using Epsom salt isn’t just effective at killing these creatures but can also prevent them from returning time and time.

Does Epsom Salt Kill Fungus Gnats

epsom salt to kill fungus gnats

Small flying insects might appear in your house from time to time, especially in the summer. They will find a suitable place for breeding and laying their eggs.

Before fungus gnats arrive, you’ll see different signs, such as tiny white worms crawling around on the floors and window sills.

To prevent fungus gnats from settling in your house, try to fix any cracks you might have in your bathroom because fungus gnat larvae are drawn to moisture.

You can also use a cup of bleach to disinfect the floor or spray insecticides with permethrin which is effective against a wide range of household insects.

How Effective Is Hydrogen Peroxide For Killing Fungus Gnats?

Hydrogen peroxide is best at killing the larvae of fungus gnats living in the soil, but it will not effectively keep them away for good, as so many blogs claim.

If a fungus gnat infestation is left to persist without treatment, many adult fungus gnats will continue showing up from time to time.

That’s why other extermination techniques must be used in combination with the use of hydrogen peroxide spray: dish soap, white vinegar or essential oils such as lemon eucalyptus oil and peppermint oil.

Is Epsom Salt effective against fungus gnats?

Yes, Epsom salt kills fungus gnats. Epsom salt can be used to ward off and eliminate them right before they cause too much damage.

It’s lethal to the little buggers when they come in contact with it – they can’t survive long when they’re living in conditions alternating between dryness and water that contain traces of Epsom salt.

How To Kill Fungus Gnats With Epsom Salt?

The key to killing Milly moths with Epsom salt is to use it in places they inhabit. To kill moths, you need to spray a mixture of water and Epsom salt on these places (both inside and outside your home).

Preparing that mixture is so easy that even a five-year-old can do. To prepare an Epsom salt moth killer:

  1. Take one cup of Epsom salt and mix it with four to five gallons of water.
  2. Stir the mixture well and pour the mixture into a spray bottle.
  3. Spray it on dark corners or in places where they can escape easily when flying around your house. The spray will kill the adults and their larvae living in those places too.

Is Epsom Salt Spray Harmful to Plants?

Too many Epsom salts can harm your plants. If you have used too many Epsom salts for your plants, it will eventually kill them.

Excessive use of Epsom salt in the soil increases its magnesium level, increasing toxic levels. So what you should do is sprinkle just a tiny amount of Epsom salt around your plants and let nature take care of them–don’t use it as your sole source of pest control!

Yes, too much of anything can be harmful, including Epsom salt. However, just a tiny pinch now and then won’t hurt.


Epsom salt is highly effective in killing fungus gnats because Epsom salt works its way through the soil to the root systems where fungus gnat larvae hideout. This can be dangerous if used too often as it will kill off fungus gnats and your plants. It’s best to use neem oil instead, which repels and kills garden pests as effectively and quietly over time, allowing you to grow your garden safely without using large amounts of potentially damaging salts.

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