Why does your Zantedeschia aethiopica (Purple) 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 breed in the moist organic matter of the soil. Their larvae feed on decaying plant material and can damage the delicate root system of the Calla Lily if populations become high.
Calla Lilies prefer moist soil but are highly susceptible to rot if left in standing water. Overwatering creates the perfect humid, anaerobic environment for fungus gnat larvae to thrive and multiply.
Potting mixes containing high amounts of peat moss or compost provide an ideal breeding ground for flies. These nutrient-rich environments attract moisture-loving pests to the Calla Lily's rhizosphere.
Your plant might also be experiencing one of these issues:
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