Will vinegar kill plant gnats?
Beside this, does vinegar get rid of gnats in houseplants?
However, instead of throwing the plant out, you can get rid of pesky fungus gnats using household vinegar. Pour one-quarter to one-half inch of apple cider vinegar into a clear or semi-opaque plastic cup, creating an effective fungus gnat trap. Place the vinegar trap near your houseplant and check it daily.
Then, how do you get rid of gnats in potted plants?
Apply organic pest control products – Pour or spray an organic insecticidal soap or a soapy water mix (I use Dr. Bronner's Baby-mild Liquid Soap) or neem oil mixture into the top of the soil to kill gnats in potted plants. These natural gnat pesticide treatments should be effective after a few applications.
Make an attractant by mixing together 2 tablespoons of apple cider vinegar, 2 cups of water and 2 tablespoons of sugar. Stir in a few drops of dishwashing liquid and pour the solution into several jars.