BioAdvancedExtreme Crabgrass Killer, Ready-to-Spray, 32 oz

After just one application, I can see the difference in my lawn! Good product.

I saw this in a hardware store and bought their last bottle. I came home and ordered 2 bottles from Amazon. I applied the first bottle (store) to my lawn - directions said it can take 10 days to work. It never worked. And while I stay upwind anytime I'm spraying, later that night my eyes and lungs were on fire. If you buy this, use goggles and a chemical respirator. This stuff was harsh on me. I'm returning the 2 bottles I bought from Amazon. I never opened the package (have to open now to put return paperwork inside box).

I've had crabgrass in about 5 spots on my lawn for years and nothing I tried before would remove it. After one application of BioAdvanced the crabgrass disappeared in about 3 weeks. I must admit i was surprised how well this product works.

This stuff killed all of the crabgrass but I'm not sure it did anything about the roots.So I used the product walking slowly and covered ~ 250sqft before the bottle was nearly empty. I think I should have moved a bit faster. A few days later I didn't see any changes, but a week later it was obvious, the crabgrass was dying. Fast forward a few weeks and the rest of my grass is thriving and beginning to fill in. Unfortunately the crabgrass came back. I'm not are if the roots survived or it was just seeds but its back. I'll spray again and add a pre-emergent. I know its not a glowing review, but this has been the most useful product I've tried.

There is no instant killing of crabgrass. It takes two weeks to see some browning of the crabgrass starting at the root. Once that happens, over days the crabgrass plant starts to totally brown out and die. I don't know if my spraying was not even but about 3/4 of my crabgrass has been killed with some plants here and there still alive. I did follow the directions and tried to spray it evenly over my yard. Possibly a second applications is necessary to kill the rest or maybe just a spot trigger spray may be enough because the plants still alive are few. So the takeaway is, the product does work, but how you apply it is crucial and it takes about 3 weeks or so to kill the plants.

It doesn't work. I used 2 bottles on my 7500 s.f. It didn't kill one weed. I still have Crab Grass and weeds. A big waste of money.

Works and doesn't kill my lawn, only weeds.

Sprayed this product on my lawn as instructed. I didn’t water for 2 days after. 5 days later the crabgrass started looking wilted & slightly less healthy. The photos I included are less than 2 week after application. The crabgrass appears to be dying slowing but each day it gets browner & more wilted. Zero damage to my fescue lawn. So I am happy with this product. I don’t care if it takes a month to kill the crabgrass as long as it dies. And that appears to be what is happening. Be patient.