Why does your Hedera helix 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 roots and fungi, often thriving when English Ivy is kept too wet.
While not the flies themselves, root rot creates the decaying organic matter that attracts gnats. Overwatering English Ivy leads to anaerobic conditions, providing a perfect breeding ground for pests.
Similar to fungus gnats, Sciarid flies are attracted to highly decomposed organic matter in overly damp potting mixes. They specifically target the moist microclimate found around the base of dense ivy foliage.
Your plant might also be experiencing one of these issues:
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