Aloe Vera Root Rot — Identification, Treatment, and Recovery
Aloe Vera (Aloe vera)
Symptoms
- leaves going mushy or translucent from the base up
- brown or black roots when plant is inspected
- foul smell from soil
- plant becoming unstable in its pot
- stem dark and soft at soil level
- plant failing to absorb water (soil stays wet for weeks)
Causes
Chronic overwatering combined with poor drainage
Aloe vera root rot is almost always caused by overwatering, and almost always made worse by insufficient drainage. The fungal pathogens responsible (primarily Pythium and Fusarium) colonize roots in anaerobic (oxygen-depleted) wet soil. The roots turn brown and soft, lose their ability to absorb water and nutrients, and the damage progresses upward into the stem. Aloe vera is particularly vulnerable because its thick leaves mask the problem until root rot is advanced.
How to Fix It
- 1
Remove the plant from its pot. Healthy Aloe roots are white to light brown and firm; rotted roots are brown-black, soft, and break easily when touched.
- 2
With sterilized scissors, cut all rotten roots back to healthy white tissue. Don't hesitate to be aggressive — any remaining rotten root material will continue to spread.
- 3
If the stem base (the basal plate) is dark and soft, cut the entire plant stem above the healthy tissue. The plant can be propagated from the remaining healthy stem.
- 4
Allow the trimmed root system (or stem cutting) to air-dry for 2–3 days in a warm, ventilated location. This allows cut surfaces to callus and reduces the risk of secondary infection.
- 5
Prepare fresh cactus and succulent mix with 50% perlite in a clean terra cotta pot. Do NOT reuse the old soil.
- 6
Place the plant in the fresh dry mix. Don't water for 2 weeks. The plant will root into the dry mix — overwatering at this stage will re-introduce rot.
- 7
After 2 weeks, water very lightly. Continue with appropriate (infrequent) watering going forward.
Prevention
- Use cactus mix with 50% perlite in a terra cotta pot
- Push a finger or wooden skewer to the bottom of the pot before rewatering, since surface dryness alone is a poor guide for a plant this drought-adapted
- Empty the saucer immediately after any water drains through — a succulent's roots have almost no tolerance for standing water
- Reduce watering to monthly or less in winter
Quick Summary
| Plant | Aloe Vera (Aloe vera) |
|---|---|
| Category | root-health |
| Likely causes | Chronic overwatering combined with poor drainage |
| Fix steps | 7 steps — see above |