Eliminating Fungus Gnats: Dry Soil and Soil Amendments

Why They’re There

Fungus gnats breed in constantly moist soil where larvae feed on decaying roots and organic matter. Their presence signals overwatering and potential root rot.

Step-by-Step Solution

1. Dry out completely: Remove drain tray, let soil dry until pot feels light. Water only when top inch is dry.
2. Amend soil (optional but effective): Gently unpot, shake off loose soil, mix remaining soil 1:1 with perlite, add a handful of horticultural charcoal. Repot.
3. Quick knockdown: Spray soil surface with rubbing alcohol (kills adults on contact). Repeat as needed.
4. Prevent recurrence: Always dump drain tray 2 hours after watering.

Key Principle

More plants die from too much water than too little. Let the soil dry between waterings—gnats will disappear naturally.