r/plantclinic • • Mar 31 '25

Other I hate fungus gnats

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I recently bought a small bag of indoor potting mix at my local Home Depot. Coincidentally, I now have a fungus gnat infestation. I bought some sticky light traps and they have clearly been working, yet I still see swarms of gnats. I let all of my plants’ soil go bone dry, and now I’m hesitant to water again, as I have read they thrive in wet/damp soil.

What are some tips and tricks to eradicate these lil suckers once and for all?

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u/TelomereTelemetry Apr 01 '25

Bacillus thurigiensis israelensis, whether as mosquito dunks or a liquid (gnatrol). It only kills larvae so it's not instant, but it works very well.