Why does your Mini Rose Bright Cupido have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
The tiny black flies are likely the adult stage of fungus gnats, which thrive in the moist, organic-rich soil typical for miniature roses. Their larvae feed on decaying organic matter and can damage the delicate feeder roots of 'Bright Cupido'.
Excessive moisture in the potting medium creates the perfect breeding ground for fungus gnat larvae. Miniature roses are sensitive to 'wet feet,' which can lead to root suffocation alongside the insect infestation.
The presence of uncomposted peat or heavy organic matter in the rose's substrate provides food for the lifecycle of small dipterans. As this matter breaks down, it attracts flies looking to lay eggs.
Your plant might also be experiencing one of these issues:
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