Why does your Mini Rose White Jewel have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
These tiny black flies breed in the moist organic matter of the rose's potting soil. The larvae feed on developing root hairs, which can weaken the miniature rose's ability to absorb water and nutrients.
Excessive moisture in the substrate creates the perfect aerobic-to-anaerobic transition that attracts fungus gnats and allows them to thrive. Miniature roses are particularly sensitive to damp feet, which can lead to secondary issues like root rot.
High amounts of decomposing compost or unbuffered peat in the rose's potting mix provide a food source for fly larvae. As the organic material breaks down, it attracts various dipteran species to the pot.
Your plant might also be experiencing one of these issues:
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