Mix one part peroxide with four parts water, and pour it through the soil at the root zone until it begins to come out of the base of the pot. The peroxide kills fungus gnat larvae on contact. Neem oil is also an effective soil drench to combat fungus gnat larvae.
What is the fastest way to get rid of gnats?
Homemade gnat killer spray: A mixture of half a cup of water, half a cup of isopropyl alcohol, and a teaspoon of dish liquid can be filled in a spray bottle. This mixture can be sprayed on the gnats directly to kill them.
Will coffee grounds get rid of fungus gnats?
Unfortunately, coffee grounds often end up in the trash even though they can be used in various ways even after you have enjoyed your hot beverage. They can, for example, help to get rid of gnats in houseplants or in the garden.
Does cinnamon kill fungus gnats?
Chamomile and cinnamon are powerful natural fungicides, which kill off the gnats’ primary food source, therefore making the soil inhospitable.
How long does it take for hydrogen peroxide to kill fungus gnats?
Step 3: Mix one part of hydrogen peroxide and four parts of water in a container. Step 4: Saturate the potting soil with the hydrogen peroxide and water mixture until it freely runs out of the container’s bottom drainage holes. Step 5: Wait for 10 minutes and repeat the step above once again.
Why are there gnats in my bag of potting soil?
Small flies in homes and greenhouses often turn out to be fungus gnats. They may emerge from houseplants’ potting soil when you water the plants, or they may fly out of a bag of potting soil when you open it. … They feed on organic material in soil and breed beneath the soil’s surface.