Why does your Mini Rose Terazza Saturnus have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
The tiny black flies are likely Fungus Gnats, whose larvae thrive in the moist, organic-rich potting soil required by miniature roses. The adults emerge to mate, while the larvae feed on decaying organic matter and can damage delicate rose root hairs.
Fungus gnat populations explode when the soil stays saturated for too long, which is a common mistake with dwarf rose varieties like 'Terazza Saturnus'. Constant moisture provides the perfect breeding ground for larvae in the top layer of the substrate.
If the potting mix for this miniature rose is too heavy in compost or peat moss, it provides an abundant food source for the larvae. High organic decay rates attract these flies to the pot.
Your plant might also be experiencing one of these issues:
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