corm rot on Oxalis Triangularis
Quick answer
If your Oxalis Triangularis has corm rot, the most likely cause is: Oxalis triangularis corms (underground storage organs) are highly susceptible to anaerobic conditions and bacterial rot when soil remains saturated for 5+ days. Unlike typical fibrous roots, the contractile root system adapted for corm positioning cannot tolerate waterlogged conditions. Erwinia and Pythium species colonize saturated substrate, attacking the corm's basal plate and spreading to daughter corms, causing rapid decline.
Start here:
- 1. 1. Immediate unpotting and inspection: Remove all soil, examine corms for soft/mushy spots or foul odor
- 2. 2. Surgical removal: Trim ALL rotted corm tissue with sterilized blade until only firm, white tissue remains
Why Oxalis Triangularis gets corm rot
Oxalis triangularis corms (underground storage organs) are highly susceptible to anaerobic conditions and bacterial rot when soil remains saturated for 5+ days. Unlike typical fibrous roots, the contractile root system adapted for corm positioning cannot tolerate waterlogged conditions. Erwinia and Pythium species colonize saturated substrate, attacking the corm's basal plate and spreading to daughter corms, causing rapid decline.
How to reverse corm rot on Oxalis Triangularis
- 1
1. Immediate unpotting and inspection: Remove all soil, examine corms for soft/mushy spots or foul odor
- 2
2. Surgical removal: Trim ALL rotted corm tissue with sterilized blade until only firm, white tissue remains
- 3
3. Sterilization soak: Submerge corms in 3% hydrogen peroxide solution for 15 minutes
- 4
4. Callus period: Air dry treated corms on paper towel in shade for 48-72 hours
- 5
5. Repot in bone-dry mix: Use fresh, dry well-draining soil; wait 7 days before first light watering
Keep corm rot off this Oxalis Triangularis
Use extremely well-draining mix (50% perlite/pumice + 25% orchid bark + 25% potting soil); water only when top 1-2 inches completely dry; employ terracotta pots to wick excess moisture; ensure drainage holes exceed 1/4 inch diameter.