Fungus Gnats on snake plant
What's Happening
Fungus gnats in snake plants indicate chronically overwatered soil conditions. While snake plants are drought-tolerant succulents using CAM photosynthesis, excess moisture promotes gnat larvae in the top 1-2 inches of soil. The gnats signal that soil is staying wet too long for this succulent, potentially leading to root rot if uncorrected. Mushrooms may also appear in soggy soil.
How to Fix It
- 1
Allow soil to dry completely (top 3-4 inches) before any watering—wait several weeks if necessary
- 2
Remove any mushrooms that appear; they indicate wet soil conditions harmful to snake plants
- 3
Apply BTI dunks or beneficial nematodes to soil to kill larvae without harming the plant
- 4
Use yellow sticky traps near soil surface to capture adult gnats and monitor progress
- 5
Repot in well-draining gritty mix with 50% perlite if soil remains chronically soggy
- 6
Switch to unglazed terracotta pots which wick excess moisture through porous walls
How to Prevent It
Water only when soil is bone-dry; use succulent-specific soil mix with 50% drainage amendment; ensure pots have drainage holes; maintain low humidity 40-60%; allow thorough drying between waterings.
Related Problems
Same Problem on Other Plants
Go Deeper
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