Why does your Rosmarinus officinalis Prostratus have fine webbing? Diagnose the cause and fix it with our step-by-step guide.
These tiny arachnids thrive in the warm, dry conditions often preferred by Prostrate Rosemary. They pierce plant cells to feed, leaving behind fine silken webs and causing the needle-like leaves to turn chlorotic or bronze.
While not a different species, extreme lack of humidity causes the Rosemary's microclimate to become ideal for mite reproduction. This stress weakens the plant's natural defenses, allowing webbing to spread rapidly across the trailing stems.
Though less likely to produce visible 'fine webbing' across the whole plant compared to Two-Spotted mites, Broad Mites can cause structural distortion and fine silk in new growth. This is more common in nursery settings with high plant density.
Your plant might also be experiencing one of these issues:
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