Why does your Lilium orientalis Mothers Choice 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-rich soil preferred by Oriental lilies. They feed on decaying organic matter and can occasionally damage delicate lily root hairs.
Overwatering creates the anaerobic, damp conditions that attract fungus gnats and encourage fungal pathogens. For 'Mother's Choice', which prefers well-drained soil, constant moisture can also lead to bulb rot.
A heavy layer of decomposing mulch or compost around the lily bulb provides an ideal breeding ground for flies. While nutrients are good, too much decomposing material attracts pests to the surface.
Your plant might also be experiencing one of these issues:
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