Why does your Monstera thai constellation 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 lay eggs in moist organic matter. Their larvae feed on the decaying roots and organic material in the potting mix, which can stress the delicate variegated patterns of a Thai Constellation.
Frequent moisture in the substrate attracts fungus gnats and provides the perfect environment for them to breed. For a Thai Constellation, which is prone to rot due to its high variegation, excess water can lead to fungal pathogens that the flies feed upon.
Old, uncompacted bark or peat moss in the substrate can become a breeding ground for flies. As this organic matter breaks down, it creates a nutrient-rich environment for larvae.
Your plant might also be experiencing one of these issues:
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