Why does your Hippeastrum Bolero have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
The most likely cause is fungus gnats, whose larvae thrive in the moist, organic-rich soil preferred by Hippeastrum. The adults emerge to lay eggs in the top layer of the substrate, feeding on decaying organic matter and occasionally damaging delicate bulb roots.
While not the flies themselves, constant moisture in the Amaryllis pot creates the perfect breeding ground for gnats and increases the risk of bulb rot. Hippeastrum bulbs are highly susceptible to fungal pathogens when the medium remains saturated.
A substrate with high peat or compost content provides a nutrient-rich environment for larvae to develop. If the Bolero's medium is too rich and lacks sufficient drainage/aeration, it attracts decomposers like fungus gnats.
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