Succulent Mix on soil
What's Happening
Succulents (Echeveria, Sedum, Haworthia) possess CAM photosynthesis—an adaptation to arid environments where stomata open at night to minimize water loss. Their compact root systems and water-storing leaves evolved for rapid drainage after infrequent rainfall events. Standard potting soil retains moisture for 7-14 days, creating chronically waterlogged conditions that promote anaerobic bacteria (Pythium, Fusarium) and cause root rot within 2-3 weeks in containers without drainage amendments.
How to Fix It
- 1
Test current mix: Water should exit drainage holes within 30 seconds—if not, drainage is insufficient
- 2
Create proper mix: 5 parts perlite, 3 parts coarse sand or grit, 2 parts potting soil
- 3
Select appropriate pot: Use terracotta or clay with drainage holes—avoid glazed ceramic or plastic
- 4
Water deeply but infrequently: Soak soil until water drains, then wait 2-3 weeks before rewetting
- 5
Monitor with wooden skewer: Insert 3 inches deep—if any moisture adheres, do not water
How to Prevent It
Formulate succulent mix with 50% inorganic drainage material (perlite, pumice, or coarse sand), 30% gritty structural component (chicken grit, fine gravel, or coarse sand), and 20% organic base (cactus soil or coco coir). Never use straight potting soil. Use unglazed terracotta pots that wick moisture through porous walls. Water only when soil is completely dry throughout pot depth.