Great product

By Edward on 05/04/2013

This worked great to kill all the weeds and crabgrass in my 1 acre yard. I used late August of 2012. Used ratio as recommended on label in a 15 gallon tow behind sprayer. I had a little left, so I wat…

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Great results

By Kelley in Durham, NC on 03/26/2012

Very effective on all clover (even hop), and broadleaf weeds in my bermudagrass in NC. I highly recommend this product.

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It Works when other stuff failed

By Anonymous in Atlanta on 08/08/2013

I would agree with some of the other comments-there is some investment up front-but it's cheaper than hiring someone and it works. I tried other stuff from Lowes and Home Depot with no luck. Used it i…

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Great Stuff

By Anonymous in Indiana on 06/09/2013

Kind of pricey, but you get what you pay for. Works great on getting rid of weeds, but don't get this stuff close to your flowers or they will be gone as well. I highly recommend this product.

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Worked Great

By Anonymous in Central FL on 07/21/2013

Q4 worked great for the broadleaf weeds and blanket crabgrass in my bermuda lawn. Didn't damage the bermuda much, even though I sprayed when the temps were hot. It didn't work well on the large-leaf c…

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Best selective herbicide ever

By Flowerpower in GA. on 03/19/2018

After dealing with weeds in my yard for years, I found this website and asked for help. They recommended Q4 Plus to kill crabgrass, chickweed, clover, etc... One application eliminated 90% of the we…

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Works as Advertised.

By Anonymous in S. New Jersey on 08/15/2013

I apply Q4 in two applications about 2 weeks apart with a 50 gal. boom sprayer, mixed at 1/2 gal to 45 gal of water. This seems adequate for covering about 3.5 acres. You can see the crabgrass begin t…

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Decent but not as great as I thought

By James in Riverside, Ca on 05/14/2017

I was excited about purchasing this product after reading great reviews. The product works but slowly and when I mean slowly, my results took about a week to 2 weeks to start seeing weeds shrink but n…

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Works Great

By Ron in Lincoln, Nebraska on 07/13/2016

Started having problems with early onset of heat this summer out of the normal Nebraska heat by a month which made watering necessary for our yard. The result was an early infestation of yellow nutsed…

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The nuclear option!

By Dave in Edgewater, MD on 09/16/2014

Tried the rest... this is the best! Follow directions regarding mowing, watering and mixture and you'll not be disappointed. Not inexpensive but worth it. I used a quart on about 1/5 acre of grass in …

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Seems to be working on the Japanese Knotweed

By M in Cleveland, OH on 07/07/2014

I happened to have a fairly large patch of Japanese Knotweed that I could not eradicate by Bobcat, hand digging, pulling, Roundup Extended Control, Lime, Ortho Brush Killer or a desperate attempt usin…

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Excellent Herbicide

By Edward in Belleville, Illinois on 05/30/2014

Q4 is an excellent herbicide that kills weeds and doesn't hurt grasses. Be sure to wait 2-3 days for the Q4 to work well, don't get in a hurry with deairing to see results too quickly. But after 2-3 d…

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Q4 Plus works great on Crab Grass

By Mike in Syracuse on 09/09/2015

I sprayed this on twice, to hit one I missed and I killed the crab grass but left the blue-grass without any damage - just what I needed

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Best weed control ever

By Mike in McMurray, PA on 09/08/2016

The weeds just wither away and disappear after a couple of weeks. Crabgrass, clover, violets, among others. I highly recommend this product if you have a need for a post-emergent weed control.

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Turf Herbicide Q4plus

By Anonymous in Hockessin, Delaware on 08/28/2013

This product is very effective. Crab grass gets brown in two days. This has made crab grass dark brown in weeks time and appears crab is dead from top. This is too early for me to say that this chemic…

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Great Product

By Chris in Suwanee, GA on 06/08/2016

Prior to purchasing this product, I had a lawn service come and spray every few weeks. However, they were behind and weeds were terrible. I was recommended this product from a friend and worked wonder…

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Q4 Plus Turf Herbicide

By James in WINDHAM on 07/14/2019

Purchased the Q4, based upon recommendation, (not cheap). Primary goal was the nutsedge, along with some crab grass and broadleaf weeds. Made sure the sprayer was calibrated, coverage was as expected…

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Very Satisfied

By Mike in Kahoka, MO on 10/06/2016

Q4Plus performed very well. Smoked crabgrass (most looked dead in 3-4 days), although a few may have recovered. (Not so many that I'm concerned) Wild violets took longer, but virtually eliminated them…

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The best I've found

By Mike in McMurray, PA on 09/26/2013

I used Q4 on crabgrass, clover and wild violets. It has taken care of almost all of my weeds! The violets took a 2nd application, as the label states. I would recommend this to everyone.

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Uneven results for me

By Rick in Chico,CA on 08/11/2015

I use this mainly for Crabgrass control in lawns I maintain. The previous chemical I used which was cheap and effective is no longer available. Q4 is pretty expensive and results have been hit or miss…

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Terrific Product

By Randy in Harker Heights, TX on 05/30/2019

I have a 15,000 sqft, Bermuda TIF 419 lawn in Central Texas. Lawn is been in place 8 years. Over that time I've used Monument, Image & Ortho weed b gone to broadleaf & grassy weeds. Doing so became…

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Product does not work and overpriced.

By H in Eagle on 06/10/2019

Dont waste your money! After 8 years of using another popular name brand (Hi-Yield 2 4-D), we were urged to try this new, more expensive herbicide on our half acre. Followed instructions and applied i…

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Crabgrass control

By Dave in West Ky on 09/25/2020

This year's premergent did not work don't know why. Spray q4 by directions wipe out bad crabgrass problem did not hurt my other grass. Hoping next year premergent works better if not will use again

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Best stuff I have tried

By Michael in Lehi, UT on 01/06/2021

Very effective on everything I have used it on. Smells terrible, but that's just the smell of impending death.

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Q4 works

By Mike in McMurray, PA on 06/17/2014

This is the best weed control product for lawns that I have ever come across.

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Did not get the desired result

By Kevin in Columbus, Ohio on 07/29/2017

I got this after reading several reviews stating it would work well for wide blade grass like weeds. I mixed according to directions, 3 Oz to a gallon. I sprayed it on a few areas and on a few broad l…

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Seems to be working

By Linda in Rhode Island on 06/22/2018

I bought this pretty much as a last resort. I moved into a house that had a front lawn that was just full of weeds. They seem to have migrated from the next house over. I have tried pre-emergents for …

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Good all around control product

By Mike in Shawnee on 08/28/2020

This product worked very well on spurge and many other broadleaf weeds. It was somewhat effective on yellow nutsedge, similar to manage, etc. It definately affected crabgrass but I wouldnt say it el…

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Weed Warrior

By Joe in Peoria, AZ on 03/24/2022

Worked well to kill a variety and multitude of weeds in my daughters yard. Some thick patches needed additional spot treatment. I combined Q4 with a surfactant and dye. Did not harm the existing Berm…

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Q4 Plus

By David in Richmond, VA on 09/19/2013

I use this product in my commercial lawn care business because it works good.

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