Why does your Mini Rose Royal White Optima 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 Royal White.
Excessive moisture in the potting medium creates the perfect breeding ground for fungus gnat larvae and can lead to root rot in miniature roses. This species is particularly sensitive to 'wet feet' due to its small container size.
If there is a buildup of old, decomposing mulch or un-decomposed potting soil in the rose pot, it provides an ideal food source for fly larvae. This attracts adults to lay eggs in the upper layers of the substrate.
Your plant might also be experiencing one of these issues:
English
Italiano
