Fungus Gnats

Asked November 6, 2017, 8:57 AM EST

Hello, I have a terrible infestation of fungus gnats in my houseplants. I've been battling them all summer, since I repotted them in the spring. I changed the soil again in late August, but to no avail. I've been using herbal pesticides, Safer brand spray, and yellow sticky flags. This past week, the gnats were back stronger than ever. Help

Anoka County Minnesota

1 Response

Keep your plants drier and let the soil dry out but don’t let the plants wilt. Fungus gnats need wet soil. Garden centers have BT and it is a non toxic treatment for fungus gnats. It will not kill the gnats but kills the larvae.