Troubleshooting
Mountain Aloe problems — and how to fix them
Mountain Aloe (Aloe marlothii) 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.
Root rot
From overwatering or poor drainage, especially in cold, wet conditions. Use mineral soil and water only when fully dry.
Frost damage
Tender to hard frost; foliage blackens and the crown can rot. Protect or bring under cover below about 2°C.
Slow / weak growth in shade
Insufficient sun produces lax, pale growth. Move to full sun.
Aloe mite (gall mite)
Causes lumpy, cancerous galls on leaves and flowers. Prune out and dispose of affected tissue; severe cases may need miticide.
Prevent mountain aloe problems before they start
Most mountain aloe issues are care-mismatch, not bad luck. Dial in the basics:
Looking for mountain aloe in general rather than its problems? Read the full mountain aloe care guide — light, water, soil and feeding.
Mountain Aloe problems — FAQ
Why is my mountain aloe root rot?
From overwatering or poor drainage, especially in cold, wet conditions. Use mineral soil and water only when fully dry.
Why is my mountain aloe frost damage?
Tender to hard frost; foliage blackens and the crown can rot. Protect or bring under cover below about 2°C.
Why is my mountain aloe slow / weak growth in shade?
Insufficient sun produces lax, pale growth. Move to full sun.
Why is my mountain aloe aloe mite (gall mite)?
Causes lumpy, cancerous galls on leaves and flowers. Prune out and dispose of affected tissue; severe cases may need miticide.