Fungus gnats
Small black flies drifting up from the pot whenever you disturb it are fungus gnats.
Diagnosis
Fungus gnats
What's happening
Fungus gnats are harmless to look at but signal a real problem: their larvae live in the top layer of soil and thrive only when the mix stays constantly damp. On a Chinese Evergreen they're almost always a sign you're watering a little too often or the soil holds too much moisture, which also risks the roots over time.
How to fix it
Let the top 2 inches of soil dry out fully between waterings — this alone breaks the larvae's life cycle and is the real fix. Bottom-water for a while so the surface stays dry, and consider repotting into a chunkier, faster-draining mix if the current soil stays soggy. Yellow sticky traps will catch the adults while the dried-out surface clears the larvae.
What fixes it
- A well-draining indoor potting mix — A chunkier, faster-draining potting mix keeps the surface dry so fungus gnat larvae have nowhere to breed.
If that doesn't fix it
This is general guidance based on common symptoms; individual plants vary.
Read the full Chinese Evergreen care guide →
Reviewed June 2026 · how we check this