How to Combat Those Little Flying Bugs - GNATS! Although fungus gnats can be a problem with indoor plants at anytime of year, they can be a bigger problem during the warmer months as they are also outside in greater numbers and, no doubt, plotting an invasion of your home... :) Not a Fungus Gnat-Just One of My Plants Here is a little information about fungus gnats: Fungus gnats are small flies, about 1/8" long, black or dark colored. Adult females may lay up to a few hundred eggs in a 7-10 day period. And they will lay them in the moist topsoil of your indoor plants, if they get a chance. Fungus gnat eggs hatch in about six days, producing small, white maggots. Larvae will grow to about 1/4" in two weeks and then form pupae. Then adults will emerge from plant media in a week or less. And the cycle begins again! While adult fungus gnats do not damage your indoor plants, they can be very annoying. You may see numbers of them about your plants, if they are
House plant care, a place for sharing ideas with Plant Lovers to help you and your indoor plants grow.