Root Rot on sansevieria trifasciata
What's Happening
Sansevieria trifasciata root rot develops when the rhizomatous root system remains in waterlogged, anaerobic soil for extended periods (7+ days). Research shows Sansevieria contains antimicrobial compounds including saponins and flavonoids that normally protect against pathogens, but prolonged saturation overwhelms these defenses, allowing Pythium and Fusarium species to colonize root tissue. The compact rhizome structure stores water efficiently but becomes susceptible to bacterial soft rot (Erwinia chrysanthemi) under oxygen deprivation below 2mg/L dissolved oxygen.
How to Fix It
- 1
Unpot plant immediately and inspect all roots and rhizomes—healthy tissue feels firm like a potato, rotting tissue yields to gentle pressure
- 2
Trim ALL black, mushy, or foul-smelling roots and rhizome sections using sterilized scissors
- 3
Treat remaining healthy tissue with 3% hydrogen peroxide solution (1:1 with water) for 20 minutes to oxygenate and kill surface pathogens
- 4
Allow cut surfaces to callus (dry scab) for 48-72 hours before repotting to prevent reinfection
- 5
Repot in completely dry, well-draining succulent mix (50% perlite minimum) and wait 7 days before first watering
- 6
Resume watering only when soil is bone-dry throughout—use moisture meter to verify bottom dryness
How to Prevent It
Water only when top 3 inches of soil are completely dry (finger test). Use unglazed terracotta pots to wick excess moisture. Maintain bright indirect light to support transpiration and prevent moisture retention. Allow soil to dry completely between waterings—typically every 3-4 weeks in summer, 6+ weeks in winter.