moldy soil on Aloe Vera
Quick answer
If your Aloe Vera has moldy soil, the most likely cause is: Aloe Vera moldy soil results from overwatering combined with poor soil aeration, creating conditions for fungal growth on the soil surface. Dense, moisture-retentive organic soils lack the air porosity needed to keep the soil surface dry. Green algae on terra cotta pot surfaces indicate chronically moist conditions unfavorable to succulents. This is distinct from harmless surface mold that appears on undisturbed soil.
Start here:
- 1. Scrub algae from pot surface with undiluted 3% hydrogen peroxide solution
- 2. Remove top 1-2 inches of moldy soil and replace with fresh gritty succulent mix
Why Aloe Vera gets moldy soil
Aloe vera
Aloe Vera moldy soil results from overwatering combined with poor soil aeration, creating conditions for fungal growth on the soil surface. Dense, moisture-retentive organic soils lack the air porosity needed to keep the soil surface dry. Green algae on terra cotta pot surfaces indicate chronically moist conditions unfavorable to succulents. This is distinct from harmless surface mold that appears on undisturbed soil.
How to reverse moldy soil on Aloe Vera
- 1
Scrub algae from pot surface with undiluted 3% hydrogen peroxide solution
- 2
Remove top 1-2 inches of moldy soil and replace with fresh gritty succulent mix
- 3
Repot if soil is compacted throughout — use 50%+ perlite/pumice in new mix
- 4
Improve airflow around plant with small fan on low speed
- 5
Allow soil to dry completely between waterings; reduce watering frequency
Keep moldy soil off this Aloe Vera
Use well-draining succulent soil with 50%+ inorganic perlite/pumice; water only when top 2-3 inches are bone-dry; ensure good air circulation; avoid mulching soil surface with decorative stones that trap moisture.