I tried this out on few different types of weeds including bluegrass, but did not work well on some weeds and did not work at all on the others. I will look for something else to use.
Atrazine only killed a portion of our weeds, but we do live in Florida where there are lots and lots of weeds. The labeling indicates you must use extreme caution when applying this product.
It did the job on some areas but over all it felt as if I was feeding them nutrition to the other weeds. I'm not an expert so I went with this first but now I switched to Blindside and that stuff does work!