Why does your Amaryllis Mega Star 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 Amaryllis potting soil. They feed on decaying organic material and can damage developing root hairs if populations become high.
Fungus gnat populations explode when the substrate remains saturated, a common issue for Amaryllis which prefers drying out between waterings. Constant moisture also promotes the fungal growth that serves as the primary food source for larvae.
Potting mixes containing high amounts of peat moss or compost provide an ideal breeding ground and food source for fly larvae. The nutrient-rich environment required for large Amaryllis blooms can inadvertently attract these pests.
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