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Fungus Gnats on zz plant
What's Happening
Fungus gnats are attracted to moist organic matter on the soil surface. In ZZ plants, their presence is a critical warning sign that the top soil is not drying out fast enough, which precedes root rot.
How to Fix It
- 1
Drying out: Let the soil dry completely to kill larvae.
- 2
Bottom-water: Stop top-watering to keep the surface soil dry.
- 3
Mosquito Bits: Use BTI (Bacillus thuringiensis israelensis) to kill larvae in the soil.
- 4
Yellow sticky traps: Catch adult gnats to break the lifecycle.
How to Prevent It
Never top-water ZZ plants if fungus gnats are present. Use a gravel or sand top-dress to discourage egg-laying.
Related Problems
Same Problem on Other Plants
Go Deeper
This is covered in-depth in the zz plant Mastery Pack — structured modules with video walkthroughs, advanced protocols, and rescue timelines.
Get the Mastery Pack — $37 →Frequently Asked Questions
What causes fungus gnats on my plant?
Fungus gnats are attracted to moist organic matter on the soil surface. In ZZ plants, their presence is a critical warning sign that the top soil is not drying out fast enough, which precedes root rot...
How do I fix fungus gnats?
Drying out: Let the soil dry completely to kill larvae.. Bottom-water: Stop top-watering to keep the surface soil dry..
How do I prevent fungus gnats from happening again?
Never top-water ZZ plants if fungus gnats are present. Use a gravel or sand top-dress to discourage egg-laying.