Black Spots on Aloe Vera: Bacterial/Fungal Leaf Spot Treatment

My long-established garden Aloe vera has black spots like rose black spot, with wilting brown leaf tips. What is this and how do I treat it?

Diagnosis: Bacterial/Fungal Leaf Spot

Aloe is prone to leaf spot diseases (Alternaria, Colletotrichum, bacterial pathogens) during periods of:

• Excessive rainfall
• Cloudy, humid weather
• Overhead watering
• Poor air circulation

Treatment: Copper Fungicide

Hi-Yield Copper Fungicide (or similar fixed copper):

• Effective against both fungi and bacteria
• Organically approved
• Safe for succulents
• Apply per label, repeat in 7–10 days

Cultural Management

1. Remove worst-affected leaves (cut at base, destroy away from plants)
2. Stop overhead watering—water at soil level only
3. Improve air flow—thin crowded plantings
4. Ensure fast drainage—amend soil with grit if needed

Monitor

If spots enlarge or multiply after 2 treatments, reapply. Most cases resolve with cultural correction + copper.