Why does your Mini Rose Yellow Star 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 breed in the moist organic matter of the potting soil. Their larvae feed on fungal mycelium and can damage the delicate feeder roots of miniature roses.
Frequent watering or poor drainage in miniature rose pots creates the perfect humid environment for fungus gnat larvae to thrive. Miniature roses are particularly susceptible to root suffocation if the substrate remains saturated.
A potting medium containing high amounts of peat moss or compost provides an ideal food source for the larvae of these flies. As the organic material breaks down, it attracts moisture-loving pests.
Your plant might also be experiencing one of these issues:
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