Why does your Graptopetalum pentandrum subsp. superbum 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 matter of succulent soil. They feed on decaying plant material and can damage the developing root system of your Ghost Plant if the infestation is severe.
Fungus gnat populations explode when succulent soil remains damp for too long. For Graptopetalum, constant moisture prevents the necessary dry-down period, creating a perfect breeding ground for fly larvae.
Using standard potting soil instead of a well-draining cactus/succulent mix provides too much decomposing organic material for flies to lay eggs. The nutrient-rich, peat-heavy medium acts as a primary food source for the larvae.
Your plant might also be experiencing one of these issues:
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