Root Rot on fiddle-leaf-fig — Fix & Prevention

What's Happening

Root rot in Ficus lyrata develops when shallow, epiphytically-adapted roots remain in waterlogged soil for 7+ days. Primary trigger is overwatering frequency—not volume, but watering before soil dries. Anaerobic conditions (<2mg/L oxygen) promote Pythium/Phytophthora colonization. Contributing factors: dense peat-based mixes, pots without drainage, oversized containers retaining moisture, low light reducing transpiration.

Alternative causes:

• Root rot in Fiddle Leaf Fig develops when soil remains waterlogged for extended periods, creating anaerobic conditions where fungal pathogens (Pythium, Phytophthora) proliferate. Overwatering, poor drainage, insufficient light (which reduces transpiration), and pots without drainage holes are primary contributors. FLF is particularly susceptible due to its epiphytic ancestry preferring quick-draining conditions.

How to Fix It

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1. INSPECT: Gently unpot and remove soil; healthy roots are firm and white/cream
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2. IDENTIFY ROT: Rotting roots are black/brown, mushy, may have foul odor; often progresses into rhizome crown
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3. SURGICAL REMOVAL: Trim ALL affected roots with sterilized scissors; treat cuts with cinnamon or diluted hydrogen peroxide
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4. STERILIZE & REPOT: Rinse remaining roots in 3% hydrogen peroxide (1:4 with water) for 20 minutes; repot in fresh, dry, well-draining mix
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5. RECOVERY PROTOCOL: Place in bright indirect light, 40-60% humidity; withhold water 7-10 days, resume only when soil is bone dry
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6. EXPECTATIONS: Recovery is 4-8 weeks; above-ground improvement lags behind root regeneration

How to Prevent It

Water only when top 2-3 inches are completely dry (finger test or meter). Use well-draining aroid mix: 50% potting soil, 30% perlite, 20% orchid bark. Ensure drainage holes; use terracotta for moisture-wicking. Match pot size to root ball—only 1-2 inches larger. Provide bright indirect light (2000-5000 lux) to maintain transpiration.

Same Problem on Other Plants

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Frequently Asked Questions

What causes root rot on my plant?

Root rot in Ficus lyrata develops when shallow, epiphytically-adapted roots remain in waterlogged soil for 7+ days. Primary trigger is overwatering frequency—not volume, but watering before soil dries...

How do I fix root rot?

1. INSPECT: Gently unpot and remove soil; healthy roots are firm and white/cream. 2. IDENTIFY ROT: Rotting roots are black/brown, mushy, may have foul odor; often progresses into rhizome crown.

How do I prevent root rot from happening again?

Water only when top 2-3 inches are completely dry (finger test or meter). Use well-draining aroid mix: 50% potting soil, 30% perlite, 20% orchid bark. Ensure drainage holes; use terracotta for moistur...