Root Rot Complete Guide on snake plant
What's Happening
Root rot in Sansevieria trifasciata develops when the compact rhizomatous root system remains in waterlogged, poorly aerated soil for 7+ days. Anaerobic conditions promote bacterial and fungal pathogens (Pythium, Fusarium) that break down root tissue. When rot progresses to the rhizome crown, the crown becomes soft and discolored, threatening the entire plant's survival. Advanced rot occurs when oxygen levels drop below 2mg/L in saturated soil.
How to Fix It
- 1
Remove plant from pot to assess root health monthly. Healthy tissue feels firm; rotting yields to pressure. Check odor: earthy = healthy, sour/foul = rot.
- 2
Unpot, rinse, and sterilize tools with 70% alcohol. Trim ALL black, mushy roots and rhizome sections.
- 3
Soak remaining roots in 3% hydrogen peroxide (1:1 with water) for 20 minutes to sterilize.
- 4
Lay plant on dry paper towel in shade for 48 hours to callus cut wounds.
- 5
Repot in fresh succulent mix: 50% soil + 30% perlite + 20% bark. Wait 1 week before watering.
- 6
Week 1-2: Callusing phase. Week 3-4: Check for new white root tips. Week 5-6: Leaves firm up. Week 7-8: New growth emerges.
How to Prevent It
Water only when top 3 inches of soil are bone-dry. Use unglazed terracotta pots for natural moisture wicking. Maintain bright indirect light to support transpiration. Adopt 'soak and dry' cycle: thorough saturation followed by complete soil dryness. Wait 3-4 weeks minimum between waterings. Refresh soil mix every 12-18 months.
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