Q4 Plus is highly selective on cool-season turf grasses. Labeled species include bluegrasses, ryegrass, tall fescues, and bermudagrass. Q4 Plus herbicide has a CAUTION signal word, a good toxicological profile, is rain-fast in 6 hours and has a 4 week reseeding interval.
- Convenient post-emergent control of both grassy and broadleaf weeds
- Crabgrass and foxtail control
- Yellow nutsedge control
- Wide window of application for broadleaf weeds
- Protox inhibitor activity for rapid desiccation and death of broadleaf weeds
- Fast visual response
- Highly selective on cool-season turf grasses
- For use on bluegrass, ryegrass, tall fescue and bermudagrass
- Rain-fast in 6 hours
- Suitable for applications up to 90 degrees F
- Water-based formulation
|Active Ingredient:||Quinclorac - 8.43% |
Sulfentrazone - 0.69%
2,4-D, dimethylamine salt - 11.81%
Dicamba, dimethylamine salt 1.49%
|Target pests:||Barnyard grass, Bull Thistle, Chickweed, Clovers, Crabgrass (large & smooth), Dandelion, Nutsedge yellow, Signalgrass and others |
* See label for complete list
|For use in:||Golf Courses, Commercial and Residential Lawns, Cemeteries, Public Parks, Sports Turf, Sod Farms and others |
* See label for complete list
|Application:||Cool Season Grasses: 2.6 - 3 oz. per 1,000 sq. ft. (7 - 8 pints per acre) |
Warm Season Grasses: 1.8 - 2.6 oz. per 1,000 sq. ft. (5 - 7 pints per acre)
* See label for complete application instructions
|Pet safe:||Yes, if used as directed on label|
|NOT FOR SALE TO:||NY, MA|
|Manufactured By:||PBI Gordon Corporation (UPC: 070251697878)|
See all 13 reviews »
9 of 10 people found this review helpful:
By Kelley in Durham, NC on March 26, 2012
Very effective on all clover (even hop), and broadleaf weeds in my bermudagrass in NC. I highly recommend this product.
5 of 5 people found this review helpful:
By Edward on May 4, 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 watered down maybe 1 gallon of the mixture to fill my 15 gallon tank, and it still killed alot of the crabgrass in my neighbors yard. Would buy again.
3 of 3 people found this review helpful:
July 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 crabgrass, but it completly killed the low-growing blanket crabgrass.
2 of 2 people found this review helpful:
June 9, 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.
2 of 3 people found this review helpful:
It Works when other stuff failed
August 8, 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 in hot weather but had little damage to my Bermuda grass. It killed some pretty large patches of crab grass and other weeds. Pay attention to the proper mix. Would buy again
1 of 1 people found this review helpful:
The best I've found
By Mike in McMurray, PA on September 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.
1 of 1 people found this review helpful:
By David in Richmond, VA on September 19, 2013
I use this product in my commercial lawn care business because it works good.
1 of 2 people found this review helpful:
Turf Herbicide Q4plus
August 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 chemical has gone to roots of crab to kill for ever.
1 of 1 people found this review helpful:
Works as Advertised.
August 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 to turn purple in about 3-5 days, then yellow in about 6-10 days. If you need a post-emergent crabgrass treatment, this is a good choice.
By Edward in Belleville, Illinois on May 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 days, weeds are brown and dying. Will buy again from DoMyOwn and will buy Q4 again too.
By Mike in McMurray, PA on June 17, 2014
This is the best weed control product for lawns that I have ever come across.
Seems to be working on the Japanese Knotweed
By M in Cleveland, OH on July 7, 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 using the Internet remedy of Vinegar/Soap/Salt mixture. My dentist (yes my dentist) raved about Q4 so I thought why not? We looked online and saw Knotweed was on the list of weeds that Q4 kills so I ordered from here. I applied after pulling these weeds again and noticed no growth 4 days after the last "battle" This weed can have growth of about 4 inches after 4 days. The weekend came and I noticed no new growth. Next weekend came and I notice a few stems with minimal leaves probably because they were missed the 1st time (used 1 gallon hand sprayer). So I pulled the stragglers and sprayed the entire area again including in the grassy areas where it crept. No browning of the grass. This is the best product I used so far and time will tell if it kills it for good but I think I can keep this horrible weed at bay with Q4. I can't give a 5 star until I know it is gone but I am very pleased with the product so far.
The nuclear option!
By Dave in Edgewater, MD on September 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 two applications in early September with excellent results.
Have a question about this product?
Ask our product experts...
Ask a Question
March 15, 2013
Eric from Bear, De asked:
QTemperature to apply Q4 Plus?
What is good outdoor temperature to spray in? What is too cold?
AThe product label for Q4 states that you should not apply the product above 90 degrees. Although it does not give a specific temperature for being too cold, most herbicides should be applied between 65 degrees and 85 degrees.
July 28, 2013
Jason from Fort Gibson, Ok asked:
QMixture of Q4 plus per 1000 sq. feet?
AThe mixing ratio of Q4 really depends on what and where you are treating. The product label suggests using 1.8-2.6 fl oz per one gallon to treat 1000 sq. feet.
June 17, 2013
Don from Hugo asked:
QWill Q4 work better with the addition of adding a spreader sticker to my mix?
A Certain spray tank additives such as surfactants may reduce the selectivity on the turfgrass. Use adjuvants only when your experience indicates that the tank mixture will not result in objectionable turf injury.
Certain spray tank additives such as surfactants may reduce the selectivity on the turfgrass. Use adjuvants only when your experience indicates that the tank mixture will not result in objectionable turf injury.
May 15, 2012
Bob from Lawrence, Ne 68957 asked:
QIs Q4 Plus Turf Herbicide effective on quack-grass in bluegrass lawn?
AQ4 is not labeled for quackgrass. Quackgrass unfortunately is too closely related to Kentucky BlueGrass and most products that will kill quackgrass will also severly damage if not kill the KBG. The common recommendation is to kill the quackgrass with a glyphosate product and then reseed with KBG.
November 8, 2011
Jim from Javksonville, Florida asked:
QIs it ok and effective to use Q4 on Zoysia grass?
My yard was sodded three weeks ago. A lot of clover is growing up thru the grass, The grass is Zoysia. Please advise.
ANo, Q4 is not for use on Zoysia Grass and if used on newly sodded Zoysia you would most likely kill it. We do have products you can use to remove clover from Zoysia, however, we do not recommend applying any pre or post emergents on newly sodded grass. Depending on where you live in the country, if you are in an area that is in transition and will soon be going dormant, if you apply a post emergent herbicide you can forever damage the Zoysia grass. It is recommended that you wait a full growing cycle before applying pre or post emergents on your grass to ensure it can handle the shock of applying an herbicide. We recommend that you mow your grass often to suppress the clover, water it often, and wait until next early summer to treat the clover if it still exists. At that point in time your grass would have gone through the spring growing season and should be able to handle the application of an herbicide. To remove clover and other weeds out of Zoysia grass at this point, we recommend SpeedZone.
October 5, 2014
Joseph from Raleigh, Nc asked:
QIs Q4 safe for a backyard where a dog would roam. If not, how long after application would be required?
We have a family dog that likes to go in the backyard, but are worried that something this extreme may make him unable to be outside. Is it safe? Once it's dry is it safe? This came highly recommended, but the person recommending it didn't know how it might effect pets.
It will be safe for you to apply Q4 Plus Turf Herbicide and allow to completely dry prior to allowing your dog in the treated area.
August 11, 2014
J. from Fred'burf Va asked:
QIs Q4 Plus safe for family pets?
A Q4 Plus Herbicide is safe for pets as long as they are not in the area during treatment or while wet. Once the surfaces are completely dry, they can re-enter the area.
August 1, 2014
Tom from Fremont In asked:
QWill Q4 Plus Turf Herbicide kill Creeping Charlie in lawns?
Q4 Plus Turf Herbicide is not specifically labeled for creeping charlie. We would recommending spot treating with a glyphosate product such as Roundup QuikPro. Please let us know if you have any additional questions.
August 1, 2014
Robert from Bethlehem ,pa asked:
QSee detail question regarding Q4
Q4- Have sedge and crabgrass in lawn. Do I spray entire lawn or just individual plants? Lawn is about six months old
Q4 Plus Turf Herbicide can be applied as a broadcast treatment. Please bne sure to review the product label to ensure this product will not harm your type of turf.
June 29, 2014
Jim from Hanover, Pa asked:
QIs Q4 an effective post emergent control to treat the ryegrass in my lawn?
Q4 Plus Turf Herbicide is highly selective on cool-season turf grasses including ryegrass so it is tolerable. For a selective product recommendation for your turfgrass, please contact us and also provide the turf species that you do have. We can be reached at 866.581.7378 M-F 9-5PM EST.
April 30, 2014
Charles from Clayton, Nc asked:
QHow to treat my lawn for weeds without killing my grass?
I have fescue grass with many types of weeds I am new to treat lawns so I need help choosing a product. I have a lot of green clover and dandelion. I have sprayed amine 400(2,4-D) but it has not really done the perfect job I seen the dandelion die but clover is unaffected by this product.
A Q4 Plus is highly selective on cool-season turf grasses such as fescue and works extremely well on various broadleaf weeds including clover.
October 8, 2013
Rick from Louisville, Ky asked:
QHow much area will the quart size of Q4 Plus treat?
July 18, 2013
Kevin from New Jersey asked:
QCan this product be applied with a hose-end sprayer?
My other option is a backpack sprayer but I'm looking to do the whole yard not spot spraying.
A Yes, Q4 Plus can be applied using a hose end sprayer. You may however have more accuracy with the backpack sprayer. Please follow the product label for application.
July 12, 2013
Mj from Roswell Ga asked:
QSprayed my yard with Q4 but had heavy rain 4 hours later. Should I re-apply?
I sprayed my Bermuda grass with Q4 about 11:30 am as the forecast did not call for rain till the next day. About 4:00 pm it poured rain for a good 45 minutes to an hour. I read the product is rain proof is 6 hours, but this was not quite 6 hours and the rain was very heavy. Should I re-apply or what?
A Were the rain to be a light sprinkle then the 4 hours should be okay, but with a heavy rain for that length of time we would suggest reappying the Q4 to ensure you get the accurate results you are looking for from this product. Please let us know if you have any other questions.
November 22, 2012
Robert from Shelby Twp, Michigan asked:
Qhow effective is q4plus on wild violet?
A Q4 will work for wild violet but it may require a couple of applications to be effective.