I hope someone out there has better luck with Roundup than I've had.

I got it to kill weeds and grass before seeding and it said it would "show results within 6 hours."

Well, the "results" were that it just made the grass a little bit brown and didn't kill it at all. This was after I basically soaked the ground with the stuff.

MNow, maybe I have some kind of hardy midwest grass that's super-hard to kill (lol), but I'm looking for something else - Roundup didn't do squat. Just FYI to check and see what works for other people in your neck of the woods before you spend too much money.