Why does your Rhododendron austrinum have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
The presence of tiny black flies around the soil surface of a Golden Azalea typically indicates fungus gnat larvae living in the top layer of organic matter. These larvae feed on decaying plant material and can damage delicate feeder roots of the Rhododendron if populations become high.
Fungus gnat populations explode when the substrate remains consistently saturated, which is a common issue for Golden Azaleas that require well-draining, acidic soil. High moisture levels also promote the growth of fungi that serve as the primary food source for the larvae.
If the potting medium contains large amounts of uncomposted peat or bark, the decomposing organic matter provides an ideal breeding ground for flies. In Rhododendron species, this decomposition process attracts moisture-loving insects.
Your plant might also be experiencing one of these issues:
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