Posted 2M ago by @SuaveOtanthus

Fungus Gnats in Soil


Hear me out, I am a university student and donโ€™t have a lot for expensive soil or to make my own mix, so I got some miracle gro and repotted one of my plants today in it. Within a few hours I saw a fungus gnat flying around my apartment that I have never noticed prior to doing so and Iโ€™ve kept a close eye on my plants as of late.

What should I do with the plant?

I just sacrificed it to sit outside for now because I feel like itโ€™s almost definitely the source and I donโ€™t want it spreading gnats to my other plants because I live in a country where the mosquito bits everyone raves about are really expensive and will take quite some time to get to me if I order them, and I donโ€™t want to deal with an infestation.

That being said, I feel bad. Itโ€™s just a little croton out by itself. Lol.
4โ€ pot with drainage
Last watered 2 months ago
Gnats are annoying, but generally donโ€™t do any damage unless they really settle in to the soil. I wouldnโ€™t worry about moving it back inside. First line of defense is to let the soil totally dry out, and make sure thereโ€™s no standing water in the drip trays. That will help to stop the larvae from surviving in the soil. If you can find a sticky trap or 2, that will help you get those that do make it and are flying around. When you do water again, you can add hydrogen peroxide as well ๐Ÿ‘๐Ÿป
You can also sprinkle ground cinnamon on the surface of your soil! It's cheap and is a great antifungal agent that will help to kill of any naturally occuring fungus in your soil... Which is what the wee buggers eat!!

A peroxide drench when time to water is probably the cheapest, easier way to deal with gnats... But you will need to keep treating them (& probably the rest of your plants too, even though Apollo is quarantined!) until you haven't seen a single giant for 2-3 weeks! (Their life ycke is roughly a month)... It only takes ONE GNAT or larva to slip by you and you'll soon be infested again!! Lol. You can also switch to bottom watering, which helps (but has it's own issues) and as @debbiedo says DEFINITELY adjust your watering routine so the top couple of inches of soil (which is where the larvae live) dries completely before you water again. Don't rely on any apps or plans to tell you when it's time to water, there are SO many factors that can affect drying out rates! Lol

The good old "dip test" is a great way to tell if it's watering time... And it's totally free! ๐Ÿฅฐ Best of luck! Xxx
Sprinkle soil with cinnamon. bugs donโ€™t like it!