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  • fungus gnat products

    Created by Sarah on

    We apparently bought a bag full of fungus gnat potting soil, and since then, have had trouble with getting rid of the obnoxious gnats. We have tried diatomaceous earth, hydrogen peroxide, burying with small pebbles and even sand. Any better suggestions for a lasting eradication? Even the organic potting soil we’ve bought since has not helped (but that may be because the gnats weren’t fully eradicated before we planted more seedlings).
    Thank you!

  • Author
  • #234252

    Eric Vinje

    Hi Sarah –

    Hmm, let me guess… was it Miracle Gro Potting Soil?

    Fungus gnats are a common pest of plants grown indoors, especially where humidity and moisture are high. Now that you’ve had a problem with them you will notice them flying around most nurseries and garden stores. To combat them you will need to go after both the larvae (in the soil) and the egg laying adults. We typically recommend you top dress houseplants with Beneficial Nematodes to destroy the larvae stage and Yellow Sticky Traps placed horizontally at the soil surface to capture large numbers of adults. Here’s a link that will help:


    Good luck!

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