Cockroach, palmetto bug — a lot of people think these are two different bugs. They’re not, mostly. If you’re in Florida or anywhere in the Southeast, “palmetto bug” is just what locals call the bigger roaches, especially the American cockroach. Same bug people picture something more nightmarish and give it a folksier name.
What to actually buy
Bait works better than spray for roaches. They carry it home to the colony instead of just dying where you can see them. Advion Gel Bait is what most techs use themselves. If you want something cheaper that also takes care of silverfish, Harris Roach Tablets do the job for less.
So what’s the actual difference?
None, really. There’s over 4,500 cockroach species on the planet, but only a handful ever show up in a house. “Palmetto bug” isn’t its own species — it’s a nickname for a group of the bigger ones: American cockroach mostly, sometimes Australian, smoky brown, Florida woods roach. They got the name from hanging around palm fronds and yard debris outside.
You’ll know one when you see it. They’re big — pushing an inch and a half — reddish-brown, with two lighter spots that show up behind the head as they get older. They’ve got wings but they’re bad at using them. More of a glide than actual flight, which is exactly why one showing up out of nowhere near a porch light makes people jump.
They almost never bite. When they do it’s just a small red mark, nothing serious. The actual issue is what they’ve been crawling through beforehand — they like filthy, damp spots, so they can drag salmonella and other bacteria onto your counters. Their droppings and shed skins are also a legit asthma trigger, which people don’t always connect back to roaches specifically.
Where they hang out
Outside, check palm fronds, woodpiles, hollow trees, anywhere near a sprinkler head. When it gets too hot, too cold, or too wet out there, they come inside — which in Florida is basically always, which is why they’re such a constant problem down here.
Inside, they go for drains, damp basements and crawlspaces, gaps around the roofline or foundation, even laundry baskets sometimes. They’ll eat almost anything — garbage, glue, hair, paper, whatever’s decaying nearby. That’s part of why a population can explode fast once they’ve found a good hiding spot. A few can turn into a few hundred quicker than you’d think.
How do you know you’ve got them
They’re nocturnal, so you can have a real infestation going and never actually see one during the day. What you’ll notice instead:
- A musty, oily smell under sinks or in cabinets
- Droppings that look like ground pepper in cracks and corners
- Egg casings hiding behind appliances
Getting rid of them
Honestly, if it’s more than the occasional stray, just call an exterminator. They can hit both inside and the exterior perimeter, and that outside treatment matters more than people think — it’s genuinely hard to replicate with store-bought stuff.
If you want to try it yourself first, skip the spray and go with bait. Advion is the one a lot of pros actually keep in their own homes — it even works on the German roaches that have started shrugging off other gel baits. Small dabs in cracks, behind appliances, along baseboards. Not out in the open, and definitely away from pets and kids — it’s bait, not something anything should be eating on purpose.
Harris Roach Tablets are a boric acid option that work the same basic way, and they’re labeled fine for homes with pets — but that just means placed correctly, not that a dog could eat one and be fine. If you’ve got a curious cat or dog, stick with sealed bait stations instead of loose tablets.
Bottom line
Cockroach, palmetto bug — same bug, different name depending on where you grew up. They’re stubborn things too: a roach can go a month without water, two or three without food, and the females can live over a year. That’s the real reason one spray isn’t going to fix it. You need to stick with treatment.