fungus gnats on Pothos
Quick answer
If your Pothos has fungus gnats, the most likely cause is: Fungus gnat (Bradysia spp.) infestations in pothos arise from perpetually moist soil surface conditions where larvae feed on organic matter and root hairs. Adult gnats lay eggs in the top 1-2 inches of soil; continuous moisture from overwatering or poor drainage creates ideal breeding habitat. Pothos tolerance for drier conditions makes chronic moisture both unnecessary and problematic.
Start here:
- 1. Cease watering immediately and allow soil to dry to depth of 2-3 inches
- 2. Apply thin layer of food-grade diatomaceous earth or ground cinnamon to soil surface
Why Pothos gets fungus gnats
Epipremnum aureum
Fungus gnat (Bradysia spp.) infestations in pothos arise from perpetually moist soil surface conditions where larvae feed on organic matter and root hairs. Adult gnats lay eggs in the top 1-2 inches of soil; continuous moisture from overwatering or poor drainage creates ideal breeding habitat. Pothos tolerance for drier conditions makes chronic moisture both unnecessary and problematic.
Other documented causes on pothos:
- • Fungus gnats (Bradysia spp.) infest Pothos when soil remains moist for extended periods, allowing larvae to feed on organic matter and fine root hairs. Adult gnats lay eggs in the top 1-2 inches of soil; larvae hatch in 4-6 days and thrive in waterlogged, poorly-draining potting mix. While rarely fatal to established Pothos, heavy infestations can stress young plants and cuttings by damaging root hairs. The primary trigger is overwatering combined with moisture-retentive soil mixes lacking adequate drainage amendments like perlite or bark.
How to reverse fungus gnats on Pothos
- 1
Cease watering immediately and allow soil to dry to depth of 2-3 inches
- 2
Apply thin layer of food-grade diatomaceous earth or ground cinnamon to soil surface
- 3
Place yellow sticky traps at soil level to capture emerging adults
- 4
Water only when soil is dry—gnat larvae cannot survive dry conditions
- 5
Repeat DE application weekly until gnats disappear (typically 3-4 weeks)
Keep fungus gnats off this Pothos
Allow top 2-3 inches of soil to dry completely between waterings; use well-draining potting mix with 30%+ perlite content; apply 1/4 inch layer of coarse sand or diatomaceous earth on soil surface to block egg-laying; deploy yellow sticky traps to monitor and capture adults; maintain proper pot sizing to avoid excess moisture retention.
Other Pothos problems
Same Problem on Other Plants
Go Deeper
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