Quick Answer: Brown spots on your Pothos typically stem from overwatering, bacterial infection, sunburn, or physical damage. Check if spots have yellow halos (bacterial), feel crispy (sunburn), or appear uniformly brown and soft (overwatering). Remove affected leaves, adjust watering to let the top 2 inches dry between waterings, and move to bright indirect light.
The Diagnosis: What’s Causing Those Brown Spots
Brown spots on Pothos (Epipremnum aureum) have four primary causes. Each requires different treatment:
Overwatering and Edema — This accounts for the majority of cases we’ve analyzed. When soil stays waterlogged, roots can’t access oxygen, causing cells in the leaves to rupture. The result: brown, soft spots that may feel mushy to the touch.
Bacterial Leaf Spot — Look for water-soaked brown spots surrounded by yellow halos. This develops when humidity stays high and water sits on leaves. Bacteria enter through stomata or minor wounds, spreading rapidly in stagnant air.
Sunburn Damage — Crispy, dry brown patches appear on leaves facing direct sunlight. Pothos tolerates low light (down to 30 lux) but burns quickly under direct afternoon sun. These spots won’t spread but won’t heal either.
Physical Damage — Brown spots from soil splashing during repotting, accidental knocks, or rough handling. These appear suddenly after plant maintenance and don’t spread to other leaves.
The Solution: Step-by-Step Treatment
For Overwatering (Most Common)
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Stop watering immediately. Let the soil dry until the top 2 inches feel completely dry to the touch.
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Check drainage. Ensure your pot has drainage holes. If water pools on the soil surface, your mix is too dense.
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Inspect the roots. If spots persist after drying, gently remove the plant from its pot. Healthy roots are white and firm. Brown, mushy roots indicate rot requiring repotting.
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Repot if needed. Remove all rotted roots with sterile scissors. Repot in fresh, well-draining mix (add perlite for aeration). Use a pot only 1-2 inches larger than the root ball.
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Resume watering carefully. Water only when the top 2 inches are dry. In winter, this may mean waiting 14-21 days between waterings.
For Bacterial Leaf Spot
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Remove affected leaves immediately. Cut at the base of the leaf stem using clean, sharp scissors. Sterilize blades with rubbing alcohol between cuts.
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Improve air circulation. Move your Pothos to a spot with gentle airflow. Avoid crowded plant shelves where humidity stagnates.
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Keep leaves dry. Water at soil level only. Never spray foliage or let water sit in leaf axils.
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Isolate the plant. Keep it away from other houseplants until no new spots appear for 2 weeks.
For Sunburn
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Relocate immediately. Move your Pothos to bright, indirect light. An east-facing window or 3-5 feet from a south-facing window works well.
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Trim damaged leaves. Sunburned tissue won’t recover. Remove severely damaged leaves to redirect energy to new growth.
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Acclimate gradually. When moving to brighter spots, increase light exposure over 2 weeks to prevent future burning.
For Physical Damage
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Wipe leaves gently. Use a damp cloth to remove soil residue. This prevents secondary infection.
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Monitor for spreading. Damage-related spots shouldn’t spread. If they do, reassess for bacterial infection.
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Handle with care during repotting. Support leaves when moving the plant. Consider removing the nursery pot before placing in a decorative container.
Prevention: Keep Your Pothos Spot-Free
Master Your Watering — Let the top 2 inches of soil dry between waterings. Stick your finger in the soil—don’t guess. In our analysis, proper watering prevents most brown spot cases.
Water at Soil Level — Pour water directly onto the soil, avoiding leaves entirely. Use a watering can with a narrow spout for precision.
Maximize Air Flow — Pothos thrives with gentle circulation. Place near (but not directly in front of) a vent or use a small oscillating fan on low.
Keep Leaves Clean — Dust leaves monthly with a damp cloth. Clean leaves photosynthesize better and show problems earlier.
Acclimate When Moving — When relocating your Pothos to new light conditions, move it gradually over 10-14 days. Sudden changes trigger stress responses.
Choose the Right Pot Size — A pot too large holds excess water, leading to root problems. Size up only 1-2 inches when repotting. If your Pothos shows brown spots and sits in a pot much larger than its root ball, downsizing may help.
FAQ
Can brown spots on Pothos leaves turn green again?
No. Once a leaf develops brown spots, that tissue is dead and won’t recover. Focus on preventing new spots and trim severely damaged leaves at the base.
How do I tell if brown spots are from overwatering or bacteria?
Overwatering spots are uniformly brown and feel soft or mushy. Bacterial spots have distinct yellow halos around the brown area and may feel water-soaked. Bacterial spots also spread faster.
Should I remove leaves with brown spots?
Yes, if more than 30% of the leaf is affected. Trim at the base of the leaf stem. For minor spotting, you can trim just the brown portions, leaving healthy tissue intact.
Why does my Pothos keep getting brown spots after I repot it?
Soil splashing during repotting causes physical damage. Keep leaves dry and clean them afterward. Also ensure you’re not overwatering the fresh soil—new mix holds water differently than old, compacted soil.
Is brown spot contagious to other plants?
Bacterial leaf spot can spread. Isolate affected plants and sterilize tools between uses. Overwatering and sunburn spots aren’t contagious.