Originally Posted by elchivito

Yup. That's where I use it. We don't have them in the house but they get pretty thick on the patio. They seem to live under the mulch in the flower beds that surround the patio. I drizzle it around on the low wall that borders the beds and the very next night I can go out and not see a single roach. Most of the baits are borate based too, but you're paying extra for a dilute product and gimmicky container. An 8 oz bottle of pharmacy grade boric acid might cost you 12 bucks but will last 3 or more seasons. Boric acid is pretty safe. It has a very high LD50. Your dog will be attracted to the sweet stuff so it's best to put it on newspaper or a paper plate or something so you can take it up in the morning. Still, not nearly as dangerous as poisons. I use it in my poultry pens too.