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  • Bayer Advanced 704140 All-in-One Lawn Weed and Crabgrass Killer Concentrate, 32-Ounce
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Bayer Advanced 704140 All-in-One Lawn Weed and Crabgrass Killer Concentrate, 32-Ounce

158 customer reviews
| 30 answered questions

Price: $17.46 & FREE Shipping
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  • Kills lawn weeds plus crabgrass without harming the lawn (when used as directed, not for use on st. augustinegrass including floratam variety, bahiagrass, carpetgrass, centipedegrass or dichondra)
  • Kills over 200 of the most common broadleaf weeds, such as dandelions and clover
  • Plus controls grassy weeds like crabgrass
  • Rainproof in 1 hour
  • Lawn can be mowed one to two days after spraying
  • Kills lawn weeds plus crabgrass without harming the lawn, when used as directed
  • Not for use on st. including floratam variety, , carpet grass, centipede grass or dichondra
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Frequently Bought Together

Bayer Advanced 704140 All-in-One Lawn Weed and Crabgrass Killer Concentrate, 32-Ounce + Chapin 20000 1-Gallon Poly Lawn and Garden Sprayer
Price for both: $36.45

These items are shipped from and sold by different sellers.

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Product Description

Kills lawn weeds PLUS Crabgrass without harming the lawn (when used as directed, not for use on St. Augustinegrass including Floratam variety, Bahiagrass, Carpetgrass, Centipedegrass or Dichondra). Kills over 200 of the most common broadleaf weeds, such as Dandelions and Clover. PLUS controls grassy weeds like Crabgrass. Won’t harm lawns when applied as directed. If the lawn is dry, water one to two days before using this product. Rainproof in 1 hour. Rain or watering one hour after application will not wash away effectiveness. Lawn can be mowed one to two days after spraying.

Product Details

  • Product Dimensions: 4.7 x 2.8 x 10.3 inches
  • Shipping Weight: 2.4 pounds (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B001OSH5P0
  • Item model number: 704140A
  • Average Customer Review: 3.8 out of 5 stars  See all reviews (158 customer reviews)
  • Amazon Best Sellers Rank: #2,492 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)
  • Product Warranty: For warranty information about this product, please click here


Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

34 of 35 people found the following review helpful By Gary on March 23, 2013
Verified Purchase
Being in the lawn business I find that people who say this product does not work are not applying it according to the directions. You must mix it according to directions and you should always put it on in the afternoon after the dew has dried otherwise you are diluting it and it won't work. The fact that you don't think that it sticks to crab grass may be correct but it runs down into the core and that's all it takes. Be patient,you will notice that it will go from dark green to light green and that means that it is dying. I've been using this product for several years and its never let me down.
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49 of 53 people found the following review helpful By mtxjohn on April 23, 2012
I'm shocked at the negative reviews. Perhaps if the reviewers found a product that worked better with the same application THEN I may consider the review accurate. That said-this stuff works awesome. I was using it in the pre-mixed 1 gallon at first but found it 1/10th as cheap by going with the 32oz. I mix 3.2 OZ in a sprayer with 1 gallon of water and that mix will easily take care of my lawn for weeks. Thats overusing the product. You only need a tiny spray to kill dandelions, broadleafsm, etc. Crabgrass? Well folks, crabgrass (I assume) must be so similar to regular grass biologically that its extremely difficult to kill. Also this is the only product I could find that advertised it killed crabgrass but NOT regular grass (roundup anyone?) It will kill crabgrass and switchgrass but it takes several applications. Weeds are one-and-done for killing but crabgrass is tough. I am crabgrass free from using this and pre-emergent fertilizer. It doesnt happen overnight folks. But for regular weeds this stuff is the BOMB. The only "con" is the 1 gallon premixed stuff has a great red dye that stains the offending weed so you know which one you applied the stuff to. This looks like its dyed but once I dilute it with water you cant "see" red on the weeds. Minor gripe. I, and my lawn, wholeheartedly recommend this product.
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48 of 54 people found the following review helpful By John on August 18, 2012
For some reason this herbicide doesn't "wet" to the crabgrass well - the droplets of spray bead up and the crabgrass doesn't absorb it well. In contrast, one drop of Roundup (which kills everything) will spread over an entire leaf amazingly well. Through trial and error I have found that adding one full tablespoon of hand soap per gallon dramatically improves wetting and thus absorption by the weed - a teaspoon of soap isn't quite enough. With most weeds - especially crabgrass - expect to have to reapply herbicide every other day at least three times to finally kill it, otherwise the crabgrass gets 'sick' but recovers in a few days.

Onion Grass Advice: If you want to kill that tall Onion grass that appears at random in your yard, buy a cheap set of stainless steel BBQ tongs and two of the small 1" diameter x 3" long replacement paint rollers. Duct tape or bolt the rollers on the ends of the tongs so that they touch each other. Wait until a couple of days before you mow, when the Onion grass is much taller than the regular grass. Then holding the tongs over a sidewallk or driveway (not grass!!) spray Roundup on the rollers (but not to the point it drips). Walk over to the Onion grass and grab them with the rollers and wipe them lightly once, coating the upper few inches with herbicide. You can do about 10-15 weeds before re-saturating the rollers with roundup. It only takes one application to kill them. Be careful not to drip on nearby grass, Roundup kills everything.
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26 of 28 people found the following review helpful By RJD253 on July 5, 2011
I had an ongoing problem with the weed corn speedwell. Tried the rest.....Ortho Weed be Gone, Trimec and several others with zero results. Bayer all in one lawn weed and crabgrass killer was the first to get rid of the aforementioned weed with no damage to the grass.
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31 of 35 people found the following review helpful By arc on June 19, 2012
I have never heard of a product killing crab grass. I had always heard the cellular structure of crab grass is so similar to regular grass they couldn't come up with something which also would kill 'good' grass. I live in WI, I don't know honestly what kind of grass in on my lawn.
That said I have a problem with crab grass and was willing to try anything. I use a pre emergent but it didn't help (I had the lawn aerated last fall and think that caused some of my problems but I can't be sure.) I have used these types of products on the lawn before and have used this procedure. I ensure the lawn is dry, not only no rain for at least a few days abut also no dew. I also don't plan to mow for several days after the application. I put the stuff on, pretty heavy in my opinion. I could see with in a few days the crab grass was stressed. The instructions said another application may be necessary after 10 days or so. I used the same procedures, dry, no mowing... It seems to have worked. I was surprised how much crab grass I had. I would add it did stress the rest of the lawn but did not kill it. I mow as high as possible, now after about three weeks I fertilized and have been watering in hopes the 'good' grass overtakes the bare spots.
Would I buy this product again. Yes.
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16 of 18 people found the following review helpful By Pete Wain on September 12, 2012
Verified Purchase
It does work on crabgrass here in coastal NC!!!
First mow your lawn to create an open wound in the crabgrass. Than spray your crabgrass. I used a two gallon tank (3.5 ounces per gallon) and focused on spraying just the crabgrass. After a couple of days the crabgrass would begin to turn purple. At the next mowing I would repeat the same process spraying the same areas (crabgrass) again. The purple would spread further into the plant. I repeated this process until the crabgrass was definitely DEAD!!! I plan on spreading some pre-emergent early Spring to limit any new crabgrass blooms. I had some St. Augustine encroaching on my bermuda/zoysia mix. In spraying the crabgrass where there was some St. Augustine the S.A. died fairly quickly. So if you have St. Augustine this spray would not be helpful. But if you want to eliminate S.A. from your yard this would work on that too.
My spraying has been on just the front yard and now I'm onto the back yard. I've already ordered more Bayer concentrate with crabgrass killer for the back yard.
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