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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|
|Shipping Weight:||2.54 lbs|
|Manufactured By:||PBI Gordon Corporation|
See all 26 reviews »
15 of 16 people found this review helpful:
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.
13 of 13 people found this review helpful:
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 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.
8 of 8 people found this review helpful:
By 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.
7 of 8 people found this review helpful:
It Works when other stuff failed
By 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 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
6 of 6 people found this review helpful:
By 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 crabgrass, but it completly killed the low-growing blanket crabgrass.
By Dan in Spotsylvania on 10/07/2016
Exactly as promised and on time
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. Worked very well on Lespedeza and what I believe to be Korean Clover, although it took even longer for these to die. These weeds and grass were my main targets, and the Wild Violets, Lespedeza, and Korean Clover were taking over my lawn. After local applicator repeatedly promised to spray my lawn, and never showed up(spring and fall for several yrs.), I bought my own trailer sprayer and did it myself. So glad I did. One concern is that label calls for quite a bit of water for coverage. This requires larger tips and pretty slow ground speed, but it is well worth the effort. Also received product in about three days with free shipping from DMO.
By John in Iowa on 09/18/2016
See a lot of the crap grass browning up but still have clover in areas. Will hit it again to see if it knocks rest of it down.
Very Good Results
By Larry in michigan on 09/17/2016
I had very good results with this product. I have tried other products such as: Bayer, Ortho etc. and using their recommended mixture amount with very little or no results. I have a 30 gallon pull behind sprayer and used it on about a 3 acre lawn in late August and it killed many of the grassy weeds and used a 2nd spot application to finish of the clover and yarrow. It was a little difficult to figure out how many oz of product to put in 30 gallons of water. But, I would highly recommend this product and will use it again next year if needed.
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.
By Gerald in Mount Vernon on 09/01/2016
Does a fantastic job killing broad leaf weeds, ausome killig water grass and sickens crab grass. Very pleased with the results
1 of 1 people found this review helpful:
Kikuyu grass control
By Pro in Southern California on 08/09/2016
Trying to control Kikuyu grass in tall fescue. Tank mixing with Turflon Ester. This mix works well for controlling other weeds as well.
1 of 1 people found this review helpful:
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 nutsedge and a few other broadleaf weeds that pre-emergant didn't keep from sprouting. I couldn't spray the whole yard, but I picked up Q4 Plus to spot spray using a normal 1 gallon sprayer to apply during one of the few below 95 degree days in the morning when it dry. Within a day the nutsedge started turning yellow and within a week what I sprayed along with other weeds was dead. I'd say about an 85% kill ratio of what was killed. Grass was unharmed and I was very happy. Other products would only have about a 50-60 percent kill rate requiring a serious second application. Follow the instructions to the letter and it works great. Very minimal need to apply second application and I can clearly see what I missed in the week following application. Even though it was hot by mid day as long as I applied it early enough in the day when the temps were in hte low 70's the grass wasn't affected when the temps reached the mid 90's when I applied. Didn't apply any water for 24 hours after application.
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 wonders. All the large broad leaf weeds were gone within a week. I fired my lawn company and will be doing it myself from now on. I still have some crabgrass so I guess I will be doing some spot spraying.
Great post emergent for Midwest America
By Nathan in EAU CLAIRE on 05/24/2016
I live in Wisconsin and this stuff rocks!
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07/28/2013 Jason from Fort Gibson, Ok
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.
03/15/2013 Eric from Bear, De
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.
10/05/2014 Joseph from Raleigh, Nc
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.
AIt 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.
03/18/2015 Steve from Canton, Ga
QWhat is the shelf life on Q4 Plus Turf Herbicide?
AThe shelf life of Q4 Plus Turf Herbicide is 3-5 years if stored in a room temperature setting. This product should be kept out of extreme temperatures, which are under 35 degrees Fahrenheit and over 90 degrees Fahrenheit.
10/06/2015 Jim from Hamden, Ct
QHow long before I can reseed after I have applied Q4 Plus Turf Herbicide?
10/11/2016 Chevo from Burke, Va
QHow long after re-seeding my tall fescue lawn in Fairfax, VA may I apply Q4 Plus?
I applied Drive xlr8 herbicide to my one acre tall fescue lawn in Fairfax, VA. 10 weeks ago, but it did NOT kill all my crabgrass. On 9/15/16, I core aerated, re-seeded, and applied McGill Compost to my lawn. The new grass is growing well, but I still have few weeds (crabgrass). Since it has been nearly 30 days since I re-seeded my tall fescue lawn, can I apply Q4 Plus Turf Herbicide to kill the remaining weeds? Our current temps are 50s at night to 60s to 70s during the day. BTW, I've already purchased and received the Q4 from your store. Thanks!
10/10/2016 Jim from Cedar Rapids, Ia
QWhy should I only use Q4 Plus Turf Herbicide twice a year?
I was using T-Zone SE to spray my yard and switched to Q4 Plus to include getting rid of Crabgrass as well. I spray my entire yard with Q4 Plus in April and September. The label says ONLY two broadcast applications per year. The problem is the Ground Ivy (Creeping Charlie). The Q4 Plus kills 90-95% of it in April but by the time September comes around, it's all grown back. My question is why can't I spray three times a year? I would think spraying in April, July and September would probably eradicate the Ground Ivy eventually. I might take a couple years but only spraying twice a year is not going to win the battle. I believe the two applications a year is based on the 2-4D in the product.
A Products such as†Q4 Plus Turf Herbicide†should only be applied the maximum amount of times listed on the product label. †This how often the manufacturer has determined it is safe for the environment to use them. As ground ivy is a winter weed, it is best controlled when products are applied in the Fall as they start to green up. †Another option is to simply pull it up in between applications, though this may take several months of doing so to gain complete control.
Products such as†Q4 Plus Turf Herbicide†should only be applied the maximum amount of times listed on the product label. †This how often the manufacturer has determined it is safe for the environment to use them. As ground ivy is a winter weed, it is best controlled when products are applied in the Fall as they start to green up. †Another option is to simply pull it up in between applications, though this may take several months of doing so to gain complete control.
03/07/2016 Mark from Rose Hill, Ks
QHow much Q4 Plus Turf Herbicide do I use per Acre in a lawn that is a mixture of Fescue and Bermuda?
I have 2.5 acres. I will be using a 30 gallon sprayer. Please tell me how much to mix to treat my 2.5 acres. Primarily for foxtail and crabgrass. I am pulling my hair out trying to figure the correct ratio.
A The mixing ratio of Q4 Plus Turf Herbicide varies with these 2 types of grasses. ††For Fescue the amount is 7- 8 pints per acre (2.6 to 3.0 fl oz/1000 sqft) For Bermuda you use 5-7 pints per acre (1.8 to 2.6 fl oz/1000 sqft).† So for the mixture you could use the 7 pints/acre or 2.6 fl/1000 sqft As for the amount of water the†label†states the following and varies depending on the type of sprayer: For Conventional Spray Equipment: 50 to 220 gal/acre For Low Volume Spray Equipment: Equipment should be calibrated to apply at least 20 gallons per acre
The mixing ratio of Q4 Plus Turf Herbicide varies with these 2 types of grasses. ††For Fescue the amount is 7- 8 pints per acre (2.6 to 3.0 fl oz/1000 sqft) For Bermuda you use 5-7 pints per acre (1.8 to 2.6 fl oz/1000 sqft).† So for the mixture you could use the 7 pints/acre or 2.6 fl/1000 sqft
As for the amount of water the†label†states the following and varies depending on the type of sprayer:
For Conventional Spray Equipment: 50 to 220 gal/acre
For Low Volume Spray Equipment: Equipment should be calibrated to apply at least 20 gallons per acre
02/02/2016 Mike from Carson City, Nv
QHow long can Q4 Plus Turf Herbicide sit as a mixed solution and maintain its efficacy?
Mixed as per label, does it remain effective sitting in a bk pk sprayer to be used over the course of 4-5 days?
A Q4 Plus Turf Herbicide†should†only be mixed when you are ready to apply the finished solution. You will want to use within 24 hours for the most effectiveness.
Q4 Plus Turf Herbicide†should†only be mixed when you are ready to apply the finished solution. You will want to use within 24 hours for the most effectiveness.
10/21/2015 Chuck from Newton, Nc
QCan Q4 Plus Turf Herbicide be used to kill bermuda grass in a fescue lawn?
A No, Q4 Herbicide is not labeled for bermudagrass control in fescue lawns. However, we would recommend Fusilade II because it can†be used to remove bermuda grass from tall fescue and zoysia grass when used at reduced rates. Please be sure to read over the product label for complete use instructions prior to use.
No, Q4 Herbicide is not labeled for bermudagrass control in fescue lawns. However, we would recommend Fusilade II because it can†be used to remove bermuda grass from tall fescue and zoysia grass when used at reduced rates. Please be sure to read over the product label for complete use instructions prior to use.
07/14/2015 J.r. from Sanantonio Texas
QWill Q4 Plus Turf Herbicide harm a St.Augustine lawn?
A The Q4 Plus Turf Herbicide product label states that it should not be applied to St. Augustine grass, so it is likely that it would be harmful to that type of grass. If you can tell us what type of weed(s) you need to treat, we will be happy to recommend a product to use that would be safe to apply to St. Augustine grass.
The Q4 Plus Turf Herbicide product label states that it should not be applied to St. Augustine grass, so it is likely that it would be harmful to that type of grass. If you can tell us what type of weed(s) you need to treat, we will be happy to recommend a product to use that would be safe to apply to St. Augustine grass.
07/14/2015 Tom from Newington, Ct
QHow soon can I mow the lawn after applying Q4 Plus Turf Herbicide?
06/29/2015 David from Florence Al 35634
QCan Q4 be applyed when temp is 75 degrees but will reach 90 degrees later?
Also, can Q4 be applied on established Empire and Meyers Zoysia?
AQ4 Plus Turf Herbicide can be applied in the morning or in evening when temps are below 85 degrees. If there is enough time for the product to dry before it hits the 90's it should stil be effective. When applied as directed it will not harm your Zoysia lawn. Since you mentioned Empire and Meyers Zoysia, you may want to make your application when Temps are staying out of the 90's.
04/22/2015 Nahun from Wasco, California
QHow long should I wait to re-seed after applying Q4 plus?
AFor newly seeded areas, it is recommended to delay application until the second or third mowing or 28 days after emergence. If you will be seeding the area, turf species listed on the product label can be seeded one week after the application of the Q4 Plus Turf Herbicide.
03/22/2015 Tony from Cleveland, Ohio
QIf I only make one application a year (3 acres) with Q4 when would it be suggested to do this in Cleveland, OH?
A. Early Spring before weeds appear, March/April B May/June beginning weed season C. July/Aug, height of weed season D. Sept/Oct. Please replay with A,B,C,D letter and week of month if possible. Thank you.
AApplication timing of Q4 Plus Turf Herbicide is going to vary depending on the types of weeds you are trying to control per the product label and it may take more than one application. It would need to be applied when the weeds are growing not before as it will only kill the weeds it makes contact with that have emerged. We do not know the exact time of year you will start applying Q4 in Ohio. Weeds grow at different times in different regions and there is no way for us to know down to the exact week. Please refer to the product label for complete instructions based on whether you are treating for grassy weeds or broadleaf weeds. If you are not sure when the weeds start to actively grow in your region you can contact the master gardener at your local cooperative extension office for more information.