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

If that doesn't fix it

This is general guidance based on common symptoms; individual plants vary.

Reviewed June 2026 · how we check this