Gnats, Flies, and Midges in Central Florida: Why They’re in Your Home and How to Keep Them Out
Central Florida’s warm, humid climate creates the perfect breeding ground for gnats, flies, and midges. These tiny pests can turn your home into their favorite hangout, but understanding what draws them in—and how to deter them—can help you reclaim your space.
Common Types in Central Florida
Central Florida is home to several types of gnats, flies, and midges, each with its own habits and preferences:
Fungus gnats are the most common indoor gnats, often found near houseplants or damp soil.
Biting midges (also called no-see-ums or sand flies) are tiny but can deliver irritating bites.
Eye gnats are small, non-biting flies attracted to moisture and human activity.
Drain flies breed in slimy, organic buildup in drains and pipes.
Fruit flies are drawn to overripe or rotting fruits and vegetables.
What’s Attracting Them to Your Home?
These pests aren’t just random visitors—they’re lured in by specific conditions and food sources. Here’s what’s likely bringing them inside:
1. Moisture and Dampness
Fungus gnats thrive in damp soil, especially around houseplants or overwatered potted plants.
Drain flies breed in slimy organic matter in sinks, showers, and garbage disposals.
Midges are attracted to standing water, including leaky pipes, trays under potted plants, and clogged gutters.
2. Decaying Organic Matter
Fruit flies and fungus gnats are drawn to overripe fruits, vegetables, and rotting plant material.
Drain flies feed on decaying food particles in drains and garbage disposals.
Phorid flies (also called “coffin flies”) are often found near decaying organic matter, including pet waste or compost.
3. Light and Warmth
Midges and fungus gnats are attracted to artificial lights, especially at dusk or dawn.
Warm indoor temperatures can encourage breeding year-round in Central Florida.
4. Human and Pet Activity
Eye gnats are drawn to human breath (carbon dioxide) and body heat, making them more noticeable near people.
Biting midges (no-see-ums) are active during dawn and dusk, when they seek out exposed skin.
How to Keep Gnats, Flies, and Midges Away
Reducing attractants and disrupting their life cycles are the most effective ways to control these pests. Here’s what works:
1. Eliminate Breeding Sites
For fungus gnats: Let houseplant soil dry out between waterings and avoid overwatering. Use a layer of sand or gravel on top of the soil to deter egg-laying.
For drain flies: Pour a mixture of boiling water, baking soda, and vinegar down drains weekly to break down organic buildup.
For fruit flies: Store fruits and vegetables in the refrigerator or in sealed containers. Take out the trash regularly and clean trash cans frequently.
For midges: Remove standing water from gutters, plant saucers, and outdoor containers. Fix leaky faucets and pipes.
2. Use Natural Repellents
Essential oil sprays: Mix a few drops of peppermint, lemongrass, or eucalyptus oil with water and spray around entry points, windows, and plants.
Herbs and plants: Place basil, lavender, lemon thyme, or marigolds near entryways to deter gnats and flies.
Apple cider vinegar traps: Fill a small bowl with apple cider vinegar and a few drops of dish soap. Cover with plastic wrap, poke holes, and place near problem areas. Gnats are lured in but can’t escape.
3. Physical Barriers
Install fine mesh screens on windows and doors to keep gnats and midges out.
Use yellow bug lights outdoors, as gnats and midges are less attracted to yellow wavelengths than white light.
4. Chemical Controls (When Needed)
Pyrethrin-based sprays (derived from chrysanthemums) can provide temporary relief but may need frequent reapplication.
Foggers or misters can help control outdoor swarms but should be used sparingly to avoid harming beneficial insects.
5. Outdoor Maintenance
Keep lawns mowed and remove leaf litter or organic debris from yards.
Use outdoor fans on patios or porches, as gnats and midges are weak fliers and avoid strong breezes.
When to Call a Professional
If you’ve tried these methods and still have a persistent infestation—especially with drain flies, phorid flies, or biting midges—it may be time to contact a pest control professional. They can identify hidden breeding sites and apply targeted treatments.