Troubleshooting
Muir's Rhinephyllum problems — and how to fix them
Muir's Rhinephyllum (Rhinephyllum muirii) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Sciara fly (fungus gnats)
Larvae attack the fine roots and can devastate seedlings. Use a gritty top-dressing of coarse sand or grit, allow the soil surface to dry fully between waterings, and treat with a soil drench of neem oil or Bacillus thuringiensis israelensis.
Root and crown rot
Sitting wet soil — especially in winter — rots the caudex rapidly. Always use a free-draining mix, ensure the pot has drainage holes, and never water in cold, still weather.
Mealybugs
Both surface and root mealybugs occur. Check the underside of leaves and root zone at repotting; treat with a systemic insecticide or isopropyl-alcohol wipe for foliar colonies.
Prevent muir's rhinephyllum problems before they start
Most muir's rhinephyllum issues are care-mismatch, not bad luck. Dial in the basics:
Muir's Rhinephyllum problems — FAQ
Why is my muir's rhinephyllum sciara fly (fungus gnats)?
Larvae attack the fine roots and can devastate seedlings. Use a gritty top-dressing of coarse sand or grit, allow the soil surface to dry fully between waterings, and treat with a soil drench of neem oil or Bacillus thuringiensis israelensis.
Why is my muir's rhinephyllum root and crown rot?
Sitting wet soil — especially in winter — rots the caudex rapidly. Always use a free-draining mix, ensure the pot has drainage holes, and never water in cold, still weather.
Why is my muir's rhinephyllum mealybugs?
Both surface and root mealybugs occur. Check the underside of leaves and root zone at repotting; treat with a systemic insecticide or isopropyl-alcohol wipe for foliar colonies.