Palmetto Bugs, Roaches, and Spiders in Florida Homes

What They Are and How to Keep Them Out

Almost every Central Florida homeowner has met a palmetto bug: a big brown roach that shows up on the bathroom floor at night, sometimes on its back. It’s alarming but usually not a sign of a dirty house. The roach that does point to a real indoor problem is much smaller, and it calls for a different approach. Spiders are the other common worry, and most of them are helping, not hurting.

Short version: “Palmetto bug” is the Florida name for several large cockroaches, mainly the American, Florida woods, smokybrown, and Australian cockroaches. They live outdoors in mulch, leaf litter, palms, and woodpiles, wander inside through gaps, and generally don’t survive well indoors, so the fix is sealing the house and cleaning up around it. The small German cockroach is different. It lives only indoors, breeds fast, and needs a steady plan of cleaning plus baits. Most Florida spiders are harmless and eat other pests. The ones that matter are the four widow species. The brown recluse is not established in Florida. For a pest company, check that it’s licensed by the Florida Department of Agriculture and Consumer Services, and ask for the technician’s ID card. In apartments and other multi-unit rentals, Florida law makes the landlord responsible for roach control unless the lease says otherwise.

Which roach is it?

Roach	Size	Where it lives	What it means indoors
American, smokybrown, Australian, brown	About 1 1/4 to 2 inches	Mainly outdoors: mulch, trees, sewers, attics, woodpiles	Usually a wanderer from outside; seal and clean up the perimeter
Florida woods cockroach	The largest, up to about 2 inches; slow, can’t really fly	Outdoors under bark, leaf litter, palm bases, woodpiles	Rarely sets up indoors; often comes in on firewood. It can spray a smelly, irritating fluid when handled
Asian cockroach	About 5/8 inch	Outdoors, drawn to lights	Flies in at night toward lights; doesn’t survive well inside
German cockroach	About 1/2 to 5/8 inch, two dark stripes behind the head	Indoors only, mostly kitchens and bathrooms	An active infestation; needs a cleaning-and-bait plan

Based on UF/IFAS Extension species descriptions. Sizes are adult lengths. Click a name for the UF/IFAS species page with photos.

Keeping palmetto bugs outside

Because the big roaches live outdoors and only wander in, the most effective control happens at the edge of the house. UF/IFAS Extension’s recommendations:

Seal gaps. An adult roach can fit through a crack about 1/16 inch wide. Caulk around pipes, wires, and window frames, add door sweeps, and repair torn screens.
Pull mulch back. Keep mulch thin and about a foot away from the foundation, and clear leaf litter and dense shrubbery touching the walls. See Florida-friendly landscaping.
Move woodpiles away from the house and off the ground, and check firewood before bringing it inside.
Cut moisture. Fix leaks, empty AC drip pans, and don’t leave standing water outside. Damp homes attract roaches and mold alike. See Florida mold prevention and AC and humidity.
Treat the perimeter only after sealing. If an outdoor treatment is used, UF/IFAS suggests a band about 3 feet out from the foundation and sheltered spots like porch corners and the bottom of the garage door.

A palmetto bug found indoors now and then, especially after heavy rain or a cold snap, is normal in Florida. Seeing several a week, or seeing them in daylight, suggests a nearby source such as a damp crawl space, attic, or plumbing chase.

German cockroaches: the real indoor infestation

German cockroaches live only alongside people, mainly in kitchens and bathrooms, and they multiply fast. A female carries an egg case of 30 to 40 eggs until just before they hatch, and generations overlap, so numbers can climb quickly. They often arrive in grocery bags, cardboard boxes, or used appliances. In apartment and condo buildings, they can also move between units.

UF/IFAS recommends an integrated approach, since relying on spray alone works poorly and builds resistance:

Clean first. Vacuum droppings and shed skins, scrub with hot soapy water to remove the scent trails that draw roaches back, wash dishes promptly, and seal food, pet food, and trash.
Use gel baits in cracks near where roaches hide, under sinks, behind appliances, and around hinges. Don’t spray insecticide where bait is placed, since it drives roaches away from the bait.
Add a growth regulator if needed. It takes four to six weeks to show results, and more roaches may be visible early on.
Dust hidden voids lightly with boric acid, under appliances and inside wall voids, never on open shelves or food surfaces.
Monitor with sticky traps to see whether numbers are falling.

Roach droppings, shed skins, and body parts are allergens that can trigger rashes and, in severe cases, asthma attacks. Roaches can also carry bacteria such as Salmonella. Those are good reasons not to tolerate a German roach infestation.

Renters, condos, and who pays

Under section 83.51(2)(a), a landlord of a rental unit other than a single-family home or duplex must make reasonable provisions for exterminating rats, mice, roaches, ants, wood-destroying organisms, and bedbugs, unless the lease says otherwise in writing. If a treatment requires tenants to leave:

The landlord must give 7 days’ written notice.
Tenants can be required to leave for no more than 4 days.
The landlord must reduce the rent for that time.

For single-family and duplex rentals, the lease decides. See Florida tenant rights and Florida landlord basics. In condos, a building-wide German roach problem usually needs the association to coordinate treatment, since treating one unit just pushes roaches next door. See Florida condo buying.

Florida spiders: which ones matter

Most spiders around Florida homes are harmless and useful, since they eat mosquitoes, flies, and garden pests. Common ones:

Golden silk orb weaver (banana spider): Builds large golden webs and bites only if squeezed, with mild, local effects.
Spiny-backed orb weaver: The small, crab-shaped spider with spikes on its back. No known serious effects in people, and it catches mosquitoes.
Wolf spiders: Large ground hunters whose venom isn’t dangerous to people.

Widow spiders are the ones to respect. Florida has four species (see UF/IFAS’s guide to common Florida spiders for more on each):

Southern black widow.
Northern black widow.
Brown widow.
Red widow.

The southern black widow female is shiny black with a red hourglass under the abdomen. The brown widow, often the most common widow around homes, is tan to dark brown with an orange to yellow-orange hourglass and leaves spiky egg sacs. It’s timid and bites are uncommon. Widows hide in garages, sheds, woodpiles, mailboxes, eaves, behind hurricane shutters, under outdoor furniture, in flowerpots, and around trash can handles. Most bites happen when someone reaches into a dark spot or puts on a shoe that’s been sitting. Their venom is significant, so anyone bitten should get medical advice. The Florida Poison Information Center is free and open around the clock at 1-800-222-1222.

The brown recluse is not established in Florida. A UF/IFAS review found verified records in only a handful of counties, mostly single buildings where the spiders likely arrived in shipped goods, and only one verified bite in the state. Wounds blamed on “brown recluse bites” in Florida are usually something else, such as an infection, so get any spreading or blistering wound checked by a doctor rather than assuming a spider.

To keep spiders down indoors:

Control the insects they eat.
Use yellow or warm-toned outdoor bulbs that draw fewer insects.
Cut clutter in garages and storage areas.
Wear gloves when moving stored boxes, pots, and firewood.
Vacuum webs and egg sacs.

Doing it yourself vs. hiring a pest control company

Sealing, cleaning, and baits handle most palmetto bug and light German roach problems. A professional makes sense for a German roach infestation that persists after a few weeks of baiting, roaches in multiple units, or anyone uncomfortable handling pesticides. When using products at home, follow the label exactly and keep them away from children, pets, and food.

When hiring:

Check the license. Florida requires every pest control business location to be licensed by the Florida Department of Agriculture and Consumer Services, with liability insurance on file (Chapter 482).
Ask for ID. Every technician who treats or sells pest control must carry a state-issued ID card and show it on request.
Get several estimates and ask how the company handles German roaches. Look for inspection, baits, and follow-up visits, not just a perimeter spray.
Read the service agreement: visit frequency, re-treatment between visits, and how to cancel.

Written contracts are legally required for termite and wood-destroying organism work, which is a separate service. See Florida termite inspections.

Buying a home? Ask the seller about pest service history and any active contracts, and look for droppings under sinks and behind appliances during the walkthrough. See the home inspection checklist. Outdoor pests such as fire ants and mosquitoes are covered separately, along with lawn health in lawn care in Central Florida.

Frequently Asked Questions

Yes. “Palmetto bug” is a Florida nickname for several large cockroaches, including the American, Florida woods, smokybrown, and Australian cockroaches. They mainly live outdoors and wander inside.

Usually not. The large outdoor roaches come in through gaps and generally don’t survive well indoors. Small roaches about half an inch long with two stripes behind the head are German cockroaches, which do indicate an indoor infestation.

Clean thoroughly, seal food and trash, and use gel baits in cracks near hiding spots without spraying over them. Add a growth regulator and light boric acid dust in hidden voids if needed, and monitor with sticky traps. Persistent infestations usually need a licensed professional.

Not as an established population. UF/IFAS found verified records only in a few counties, mostly isolated buildings, and only one verified bite in the state. Florida’s medically significant spiders are the four widow species.

Get medical advice. The Florida Poison Information Center is free and available 24/7 at 1-800-222-1222. Seek emergency care for severe pain, muscle cramps, or breathing problems.

In apartments and other rentals besides single-family homes and duplexes, yes, unless the lease says otherwise in writing. If tenants must leave for treatment, the landlord gives 7 days’ notice, the stay away is limited to 4 days, and rent is reduced for that time.

Sources

This article is for general informational purposes only and isn’t financial, legal, insurance, or tax advice – for guidance specific to your situation, talk to a licensed professional.