Why does your Thymus x citriodorus have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
Pet FriendlyThe tiny black flies are likely fungus gnats, whose larvae live in the top layer of soil and feed on organic matter and decaying roots. They thrive in the consistently moist conditions that Lemon Thyme prefers when overwatered.
Lemon Thyme is highly susceptible to root rot if the growing medium remains saturated. Excess moisture creates an ideal breeding ground for fungus gnat larvae and can cause the plant's foliage to darken before dying.
While less common as 'flying' pests in this context, certain small dark insects can be confused with flies. They cluster on the tender stems of Thyme and suck sap, causing stunting.
Your plant might also be experiencing one of these issues:
English
Italiano
