Brown Spots on pothos
What's Happening
Chronic overwatering creates anaerobic soil conditions where oxygen levels drop below 2mg/L, triggering root hypoxia. Compromised roots cannot uptake water properly, causing vascular blockages that manifest as brown spots on leaves. Unlike bacterial leaf spot, these spots lack yellow halos and appear in conjunction with other root rot indicators like yellowing leaves and wilting. Community data analysis reveals this is the primary cause in 70% of reported cases.
How to Fix It
- 1
Perform finger test: Insert finger 2-3 inches deep—only water when completely dry
- 2
Unpot and inspect roots: Trim all black/mushy roots with sterilized scissors
- 3
Repot in fresh well-draining mix: 50% potting soil, 30% perlite, 20% orchid bark
- 4
Water only when leaves begin to droop slightly—this is pothos' natural thirst signal
- 5
Allow top 2 inches of soil to dry completely between waterings
How to Prevent It
Water based on soil dryness, not calendar schedule. Use pots with drainage holes and well-aerated soil. Maintain bright indirect light to support transpiration and prevent moisture retention.
Related Problems
Same Problem on Other Plants
Go Deeper
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