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Help - fungus gnats on my houseplants!!!!!!!!

Just spotted the dratted fungus gnat in the back bedroom where I keep a lot of my houseplants. I used to use dilute hydrogen peroxide on the plants at work, as I had the chemical in the store. Didn't seem to work that well. Has anyone got any advice, I'd hate to have to bin any plants, I've only just started collecting them again this year (lockdown plant frenzy!)
I'm thinking I may have to resort to chemicals, and I really would rather not.

Posts

  • DovefromaboveDovefromabove Central Norfolk UKPosts: 64,591
    Try topping the pots with horticultural grit ... it will at least prevent the adults laying more eggs in the compost so eventually there’ll be no more hatchlings 🦟 
    “I am not lost, for I know where I am. But however, where I am may be lost.” Winnie the Pooh







  • GranniegardenerGranniegardener KentPosts: 26
    Try topping the pots with horticultural grit ... it will at least prevent the adults laying more eggs in the compost so eventually there’ll be no more hatchlings 🦟 
    Thank you, I will try that after I've treated the plants.
  • wild edgeswild edges The north west of south east WalesPosts: 5,458
    A lot of people recommend adding mosquito dunks to the water before watering the plants. Apparently it contains a bacterium that kills the larvae.
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