Why does your Rhododendron calendulaceum have tiny black flies? Diagnose the cause and fix it with our step-by-step guide.
The tiny black flies are likely fungus gnat larvae or adults, which thrive in the consistently moist, organic-rich acidic soil that Flame Azaleas require. They feed on decaying organic matter and fungal mycelium in the substrate.
While not the fly itself, root rot creates the moist, decaying environment that attracts fungus gnats. If the Rhizomatous roots of your Flame Azalea are suffocating from poor drainage, it will attract these pests.
In a natural woodland setting like the habitat for R. calendulaceum, various small flies inhabit the leaf litter layer to consume decomposing forest debris.
Your plant might also be experiencing one of these issues:
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