Ultimate Guide to Eliminating Fungus Gnats in Houseplants

Three Root Causes

1. Unnecessary repotting (most common mistake).
2. Poor-quality bagged soil (often harbors gnat larvae).
3. Amateur internet advice (sugar traps, bleach, etc.—ineffective).

Eradication Protocol

1. Remove loose soil from surface (don't expose roots).
2. Let soil dry deeply—near wilt point—before watering.
3. Water just enough to reach that dryness again within a week.
4. Be patient: 1+ month for larval cycle to break.

Follow-Up Insights

• Don't repot to smaller pots now—just manage watering carefully.
• Succulents (aloe, kalanchoe) stay drier → fewer gnats; spider plants need more moisture → more gnats.
• Pro-Mix (Premier) is a reliable commercial mix if available.
• Sugar/lemon traps catch adults but they die in a week anyway—focus on larvae.
• Aloe with tiny roots: water when top half of soil dry; new growth will be healthy.

Green thumbs are learned—you'll get there.