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Pest Education • DFW Pest Control
Fungus Gnat Control in DFW
Those tiny gnats around your houseplants are fungus gnats, breeding in damp potting soil. Learn how to dry them out and clear them.
Family-OwnedVeteran-OwnedSince 2016
Reviewed and updated June 2026
At a Glance
Fungus gnats breed in consistently moist potting soil and feed on fungi and roots. Letting soil dry is the single most effective control step.
Quick Facts
- Look: Tiny, dark, weak-flying gnats
- Breeds: Damp, overwatered potting soil
- Eats: Fungi and organic matter in soil; can nibble roots
- Concern: Houseplant nuisance; can stress seedlings
What Are Fungus Gnats?
Fungus gnats are tiny, dark, weak-flying gnats that hover around houseplants and windows. The adults are a nuisance, but the real problem is the larvae in the soil, which feed on fungi, decaying matter, and sometimes tender roots.
They thrive in consistently damp, organically rich potting mix, so overwatered plants are the usual source.
How to Control Fungus Gnats
Drying out the breeding soil is the most effective step, since the larvae cannot survive in dry conditions.
- Let the top inch or two of soil dry between waterings.
- Improve drainage and avoid leaving water in saucers.
- Use yellow sticky cards to catch adults and monitor numbers.
- Top-dress soil or use a labeled larvicide if infestations persist.
Treat the Source
Match the approach to the pest and conditions, not just the ones you see.
Explore services →Prevent Return
Reduce moisture, food, and entry points so the problem does not come back.
Request an estimate →Treatments are selected and applied per their labels. Tell us about children, pets, edible gardens, beehives, and other sensitive areas before service, and follow all preparation and re-entry instructions. More on pet- and pollinator-conscious treatment →
Common Questions
Why do I have gnats around my houseplants?
Fungus gnats breed in damp potting soil. Overwatering and rich, constantly moist mix create ideal conditions for their larvae.
How do I get rid of fungus gnats?
Let the soil dry between waterings, improve drainage, trap adults with yellow sticky cards, and use a labeled soil treatment if needed. Drying the soil is most important.
Are fungus gnats harmful?
They do not bite people and are mainly a nuisance, though heavy larvae populations can stress seedlings and tender roots.
Sources & Further Reading
Guidance changes over time. Follow current product labels and local recommendations. This page is educational and is not medical advice.
Need Help With Fungus Gnat?
Call or email for a free estimate. We’ll recommend an approach that fits your property.