Overwatering on pothos
What's Happening
Root rot in pothos (caused by Pythium or Phytophthora water molds) presents initially as localized dark spots on the lowest/basal leaves closest to soil. Plant prioritizes apical meristems during root oxygen deprivation, sacrificing lower leaves via acropetal nutrient transport shutdown. Basal leaf spotting signals anaerobic soil conditions before systemic collapse occurs.
How to Fix It
- 1
Inspect leaf position: basal (lowest stem leaves) spotting indicates root rot; upper leaf spots suggest different issue
- 2
Gently unpot and examine roots; healthy roots are white/firm, rotted roots are brown/black and mushy
- 3
Trim all affected roots with sterilized shears until only white healthy tissue remains
- 4
Repot in fresh well-draining aroid mix (50% potting soil, 30% perlite, 20% orchid bark) with drainage holes
- 5
Water only when top 2-3 inches are completely dry; use moisture meter or finger test to verify
What You'll Need
How to Prevent It
Use pots with drainage holes minimum 1/4 inch diameter; never let pots sit in standing water. Water only when top 2-3 inches are dry; weight pot to learn dry vs wet feel. Maintain 50-70% humidity with good airflow; avoid heavy soil mixes that compact and create anaerobic pockets.
Related Problems
Same Problem on Other Plants
Go Deeper
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