Why does your Mini Rose Pink Star have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
The tiny black flies are likely fungus gnat adults, which thrive in the moist, organic-rich soil preferred by miniature roses. Their larvae feed on decaying organic matter and can damage the delicate feeder roots of a Mini Rose.
Excessive moisture in the potting medium creates the perfect breeding ground for fungus gnat larvae. Miniature roses are highly susceptible to root rot if the substrate remains saturated for extended periods.
The use of fresh compost or heavy peat-based potting mixes can attract flies looking for egg-laying sites. The decomposing material provides the necessary food source for the larval stage of many small dipterans.
Your plant might also be experiencing one of these issues:
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