Fungus Gnat

Natural Habitat

Found in moist environments rich in organic matter, such as houseplant potting soil and greenhouses.

Diet & Feeding

Larvae feed on organic matter, fungi, and occasionally plant roots; adults primarily consume liquids or do not feed at all.

Behavior Patterns

Attracted to light and moisture; often seen flying sluggishly around indoor plants; life cycle is short, completing in about 3-4 weeks.

Risks & Benefits

Primarily a nuisance; larvae can damage roots of young or weak plants, but they also help decompose organic material in the soil.

Identified on: 5/31/2026