
Ratings & Reviews for BioAdvanced Extreme Crabgrass Killer 32 -fl oz Hose end sprayer Pre-Emergent Lawn Weed Killer
Ratings may include incentivized customer reviews.
What Customers Are Saying
The Bayer Extreme Crabgrass Killer appears to be an effective product for controlling crabgrass and other weeds in lawns. It effectively kills crabgrass and weeds like Japanese stiltgrass, with most customers seeing results within 1-2 weeks of application. The product is easy to apply with a ready-to-spray hose attachment. While some customers saw immediate results, others noted it takes time for the crabgrass to fully die off, and reapplication may be needed for mature or heavy infestations. The product does not harm the surrounding grass and is safe to use around the home. Overall, the product seems to be a reliable and effective solution for controlling crabgrass, as long as the instructions are followed closely.
Customer review summary generated by AI, including incentivized reviews.OK.
Would RecommendIt takes at least 10 days to see results, but it is working.
Verified Purchaser
BioAdvanced Extreme Crabgrass Killer Bottle.
Would Not Recommendthe on/off tab is so difficult to use that as I turned the bottle to turn it off I ended up spraying an area I didn't want to spray, also the spray pattern was not equal and uniform. Junk Spray Bottle. I don't know yet how the product works.
Verified Purchaser
That is very disappointing to hear, and I can understand why you'd be frustrated with this outcome. We'd like to see what we can do to help. ...

Can't find in stores.
Would RecommendHard to get in ny with all the bans on crabgrass killer. works great
Verified Purchaser
I am so pleased to hear of your positive experience with BioAdvanced Extreme Crabgrass Killer! Thank you for your review! -Madison
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Did not work
applied as directed, no results. Expected to see crabgrass turning yellow or brown as stated, but remained bright green and was grwing and spreading.
From BioAdvanced
I am very sorry to hear that you were disappointed with BioAdvanced Extreme Crabgrass Killer. When using this product, visible results will typically ...
No results
Must have quality control issues. Followed directions - first application in July when grabgrass first showing its ugly face; second applcation in August. Crabgrass doing just fine - alive and healthy. A complete waste of money.
From BioAdvanced
That is very disappointing to hear, and I can understand why you'd be frustrated with this outcome. This is certainly not the experience we intend whe...
Hope It Works
I just applied this product to my front lawn that had quite a bit of crabgrass. Its been about 4 days so far and they look like they are starting to dry up a bit. Question I have is, if I want to spot treat an area with a pump sprayer, what would be the dilution rate for this product? Thanks!
From BioAdvanced
That is terrific to hear Bob! Unfortunately, the product is EPA regulated for use in the container provided only and since the bottle is calibrated to...
Save your money
Would Not RecommendPut down as per directions,,2X..., nothing,,, this crap does not work.Save your money....
Verified Purchaser
I am very sorry to hear about your dissatisfaction with the product. I do understand how frustrating that experience would be. I would like to hear m...

Kills the crabgrass.
Would RecommendAppreciate that this is available online. It works very slowly, but turns adult crabgrass red and then dead. Wear gloves. It is smelly.
Verified Purchaser
I am so glad to hear of your positive results with BioAdvanced Extreme Crabgrass Killer! Thank you for your feedback. -Madison
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Works great
Would Recommend[This review was collected as part of a promotion.] My lawn was in dire need of some tlc after work kept me from proper upkeep. I have always dealt with crabgrass but this year we decided to try this extreme crabgrass killer and we are so thankful we did. It has taken care of all the crabgrass issues. It was extremely easy to apply and the directions are easy to follow. We also loved the option to attach and spread through the waterhose!!
From BioAdvanced
Outstanding! Thank you so much for sharing your experience! Jessica
Works wonders!
[This review was collected as part of a promotion.] This product was obtained due to tons of weeds and crab grass on our property. I did not waste any time putting this on the lawn. Within days things cleared up and my yard started looking better! I would highly recommend to others who have the same issues! It also did not have a strong chemical odor.
From BioAdvanced
Awesome! Thank you so much for sharing your experience! Jessica
Crabgrass
Would Recommend[This review was collected as part of a promotion.] You ever have crab grass growing in unwanted places or making spots in your yard? This product works wonders on it, after one use of this in spots that I had the crab grass growing in the lawn, took care of the problem! Didn’t hurt any of my other lawn care and did what it was going to say it would do!
From BioAdvanced
This really works
Would Recommend[This review was collected as part of a promotion.] This crabgrass killer really works. I used it in my lawn and around the landscape to kill the crabgrass. Within hours it started turning brown and dying. I did have to go back and reapply to a few of the crabgrass but overall, it worked the first time applied. I would recommend if you have pesky crabgrass you are looking to get rid of.
From BioAdvanced
Brilliant! Thank you so much for your review! Jessica
Not bad
[This review was collected as part of a promotion.] I have given this a few weeks to kill the crab grass and it's slowly working. Do not use this as a weed killer though. It will kill crab grass and leave everything else alone. To be honest I was hoping it would be a weed killer in general but it is not. I still have weeds and/or grass it has not killed.
From BioAdvanced
I am very sorry to hear about your dissatisfaction with the product. I do understand how that would be disappointing. I would like to hear more about ...
Worked better than expected.
Would Recommend[This review was collected as part of a promotion.] I have used many crabgrass killers in the past and none have worked better than this extreme crabgrass killer. I applied a generous amount to the lawn. The crabgrass that was treated was completely brown and dead. All I had to do was to pull it up and dispose of it. It's better to apply this when the crabgrass first starts to sprout so it's easier to get rid of.
From BioAdvanced
Amazing! Thank you so much for sharing your success with the product! Jessica
Works great
Would Recommend[This review was collected as part of a promotion.] I used this crabgrass killer between my rocks and stepping stone and I ended up seeing results extremely fast! Within hours the grass was starting to wither up!! And after a few days the grass was fully gone. The grass hasn't started popping back up yet between the stones or rocks but only time will tell.
From BioAdvanced
Awesome! Thank you so much for sharing! Jessica
Great! When using BioAdvanced Extreme Crabgrass Killer, visible results will take 4-10 days to appear. Thank you for your review. -Madison![]()