How to get rid of the flies in my plant – written by Lucas D.
A few stray flies can quickly explode into a swarm in a matter of days. These pests can damage plants and cause a great deal of frustration. Even worse, if not dealt with, the population will only continue to grow. Here are a few home remedies you can use to get rid of gnats if you don’t want to resort to harsh chemicals.
1) Let infested soil dry out. Allow the top 2 inches (5 cm) of soil to dry out completely before watering a gnat-ridden plant again.
2) Re-pot your plants. If letting the soil dry out does not get rid of the gnats, you may need to completely remove the plant from its current pot and into a fresh, clean pot with new soil.Carefully remove the plant from its current pot. Use your fingers or a soft brush to remove as much of the soil as possible. Using fresh soil is essential since the gnats may have laid eggs in the old soil.
3) Fill a jar with cider vinegar.The jar should be filled at least halfway with vinegar. White or red vinegar can also be used, but apple cider vinegar tends to work better at attracting gnats due to the mild apple aroma. Similarly, you can prepare a mixture made from 2 Tbsp (30 ml) cider vinegar, 1 Tbsp (15 ml) sugar, a couple drops of dish soap, and 1 quart (1 liter) of water. This can be used instead of straight vinegar.You can use any container with a wide mouth. A jar is generally a good choice, but a cup, bowl, or similar container would also work. Cover the jar with plastic wrap. Make sure that the plastic wrap is securely fixed onto the top of the jar.
4) Poke holes in the plastic. Use a fork or toothpick to create several small holes in the plastic wrap. The smell of the vinegar will attract the gnats, causing them to fly into the jar. Once inside, the gnats will be trapped.