Pro tip: don't reuse potting soil from a sick plant, my fungus gnat fight took 5 months

Paul Wells · 2026-10-28T19:40:03.221265+00:00

I moved my monstera into soil from a plant that had gnats and ended up with larvae in every pot on the shelf in my Chicago apartment. I tried cinnamon, sticky traps, and mosquito dunk tea before they finally died off in month 5, so what actually worked for you guys?

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Pro tip: don't reuse potting soil from a sick plant, my fungus gnat fight took 5 months | Botany Lovers - Chatter Central