Eliminating Fungus Gnats in Cactus Soil

Fungus Gnats in New Cactus Soil: Solutions

Fungus gnat larvae thrive in moist, organic-rich soil. Since cactus soil should be fast-draining and low in organic matter, the infestation likely came from the bag.

Options

1. Return the soil for exchange or refund.
2. Make your own mix: Equal parts peat moss and perlite (sterile, gnat-free).
3. Sterilize the bagged soil: Spread in a shallow pan, dry completely in sun or low oven (200°F) to kill larvae.

Prevention

• Use pots with drainage; avoid saucers holding water.
• Let soil dry thoroughly between waterings.
• Yellow sticky traps catch adults.

Once soil is gnat-free, it's safe for your Christmas cactus cuttings.