Plan the perfect garden with our interactive tool →

Home Remedies for Gnats in House Plants

...
potato slice image by Mitarart from Fotolia.com

Fungus gnats love to bug house plants. These insects (Bradysia spp.) are tiny, mosquito-like nuisances. While they tend to cluster in clouds around your plants, they do not bite and are considered harmless, though annoying. They can, however, transfer root rot or foliage pathogens from a sick plant to a healthy one. While you can use insecticides or commercial sticky traps to get rid of fungus gnats, there also are home remedies that can control them.

Water Less

According to Colorado State University Extension, the easiest way to get rid of fungus gnats is to let your house plant's soil dry out between waterings. Do not water again until the top 1 or 2 inches of soil are dry. This will keep the eggs and larvae from hatching, plus dry soil will not attract the egg-laying females. Removing any decaying bulbs or roots also will deter the gnats.

  • Fungus gnats love to bug house plants.
  • According to Colorado State University Extension, the easiest way to get rid of fungus gnats is to let your house plant's soil dry out between waterings.

Potato Slices

Placing potato slices on top of your house plant's soil will attract fungus gnat larvae. The Minnesota Master Gardeners recommend leaving the slices on the soil for four days. Look for the 1/4-inch larvae with black heads on the potato's surface, then remove the slices (throw them away; do not compost) with the larvae inside.

Vinegar

Vinegar traps may help catch the fungus gnats plaguing your plant. Rick Steinau of AskTheExterminator.com suggests placing vinegar in a lidded jar. Poke tiny holes in the lid with a needle or awl; the holes need to be as small as possible. Put a layer of peanut butter on the inside of the lid. When the gnats enter the jar, they will be trapped, drown in the vinegar or stuck in the peanut butter.

  • Placing potato slices on top of your house plant's soil will attract fungus gnat larvae.
  • Look for the 1/4-inch larvae with black heads on the potato's surface, then remove the slices (throw them away; do not compost) with the larvae inside.

Citronella

Gnats are repelled by the scent of citronella in natural insect wipes. Wipe your pot thoroughly, including the edges with a wipe. Leaving wipes near the pot or placing strips on the top of the soil may also keep the insects at bay.

Related Articles

Small Black Flying Insects On Poinsettias
Small Black Flying Insects On Poinsettias
How Does a Fly Trap Work?
How Does a Fly Trap Work?
How to Get Rid of Gnats in House Plants
How to Get Rid of Gnats in House Plants
Tiny Flying Bugs in House Plants
Tiny Flying Bugs in House Plants
Get Rid of Fungus Gnats on House Plants With Vinegar
Get Rid of Fungus Gnats on House Plants With Vinegar
How to Get Rid of Gnats in Potting Soil
How to Get Rid of Gnats in Potting Soil
Home Remedies for House Plants With Gnats
Home Remedies for House Plants With Gnats
How to Kill Roaches in My Potted Plants
How to Kill Roaches in My Potted Plants
Bugs in Indoor Plant Soil
Bugs in Indoor Plant Soil
Common Household Bugs in North Dakota
Common Household Bugs in North Dakota
How to Repel Yellow Flies & No-See-Ums
How to Repel Yellow Flies & No-See-Ums
Homemade Bug Spray for House Plants
Homemade Bug Spray for House Plants
Symptoms of Boston Fern Pests
Symptoms of Boston Fern Pests
How to Get Rid of Bugs in Petunias
How to Get Rid of Bugs in Petunias
What Causes White Squiggly Lines on My Tomato Plant Leaves?
What Causes White Squiggly Lines on My Tomato Plant...
How to Kill Blow Flies
How to Kill Blow Flies
Garden Guides
×