Why do house plants attract flies?

photo of a sundew plant

Ah, fungus gnats, the bane of all houseplant owners, (and my boyfriend, who’s plagued by them, and is pretty uninterested in the plants). Why do they inevitably turn up and bug you whilst you’re trying to drink a casual glass of wine and watch Gardener’s World? Fungus gnats are attracted by rotting organic matter and …

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