Why does your Canna South Pacific F1 Scarlet 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 matter of Canna Lily soil. They feed on decaying plant material and can damage developing rhizomes if the infestation becomes severe.
Similar to fungus gnats, these flies target high-moisture environments typical of Canna Lily cultivation. They are attracted to the nutrient-rich, damp potting mix required for large-leafed tropical plants.
While not the flies themselves, excessive moisture in Canna Lily pots creates the perfect habitat for fly larvae. Constant wetness leads to anaerobic conditions that attract various small dipterans.
Your plant might also be experiencing one of these issues:
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