RHS - Royal Horticultural Society - "Small black flies around your houseplants? These could be fungus gnats – they breed in damp composts and can be a sign of overwatering. Water plants
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ENTOEND Fungus Gnat Plant Pot Topper | 1L Resealable Pouch for Indoor Houseplants | Naturally Derived Potting Grit to Prevent and Stop Gnats and Soil Mites | Child and Pet Safe :
![Fungus gnats 'biggest threat' to houseplants this summer - 'critical' way to prevent flies | Express.co.uk Fungus gnats 'biggest threat' to houseplants this summer - 'critical' way to prevent flies | Express.co.uk](https://cdn.images.express.co.uk/img/dynamic/13/590x/Fungus-gnats-biggest-threat-to-houseplants-this-summer-critical-way-to-prevent-flies-1634097.webp?r=1656686553509)