I applied a bag of Ferti about 2-weeks ago and have seen absolutely no change in the weed growth, that germinated a little early here in Northern Texas this year. I even followed up with a spray application of Bayer Advanced weed killer, but I plan on treating again this coming weekend since many times complete elimination of weeds takes a second treatment.
I used a backpack spreader to put the Ferti-Lome For All Seasons Lawn Food Plus Crabgrass and Weed Preventer on my brumuda grass about 3 weeks ago. I do see some brown spots on the weeds. It's still to early for me to report a full review. I will give a a full month. But it seem to be working.