⚠ CriticalSnake Plant Root Rot — Pythium in Waterlogged Substrate
Commonly affects: Sansevieria trifasciata / Dracaena trifasciata (Snake Plant)
The plant leans or tips to one side, leaves pull free from the base with little resistance, and roots are brown, slimy, and smell of decay. The substrate has been consistently moist. Root rot in snake plants progresses faster than in most houseplants because the roots are relatively few and thick — once a significant portion are compromised, the plant loses structural integrity rapidly. The characteristic symptom is leaves that wobble or fall over even without physical disturbance.
Potential Causes
- 1Overwatering is the cause in virtually all snake plant root rot cases
- 2Pot without drainage or drainage holes blocked by compacted substrate
- 3Cold temperatures combined with moist substrate — root respiration slows dramatically below 15°C, making roots unable to process the moisture and highly susceptible to pathogen colonisation
Solution Steps
- 1Remove from pot immediately. Shake off all substrate and examine every root.
- 2Using sterile scissors, cut every brown or mushy root back to firm white tissue. If less than 30% of healthy roots remain, treat this as a salvage — propagate from leaves.
- 3Dust all cuts with cinnamon or sulphur powder and allow to air-dry for 24-48 hours.
- 4Repot into perfectly dry cactus substrate. Do not water for 3-4 weeks — roots will regenerate in response to the dry environment.
- 5Place in a warm position (above 20°C) to support root regeneration.
- 6After 3-4 weeks, give a very small first watering and monitor carefully.
Prevention Tip
The thick, rhizome-like roots of Sansevieria store water — the plant literally carries its own supply. This is why they need watering so infrequently. Water only when the substrate feels dry throughout.
