It is recommended to apply herbicides like QuinKill Max with a hand pump or backpack sprayer to ensure the most accurate application.
We do not recommend using dish soap to replace the required surfactant when using QuinKill Max Crabgrass and Weed Killer. Some can be ionic and may damage your lawn. We recommend using something like Duo Stick for best results.
QuinKill Max Crabgrass and Weed Killer is a post-emergent herbicide, so the best time to apply it is when the target weeds are actively growing. If you are targeting crabgrass, then it is best to treat in late spring/early summer when the crabgrass is still small, or later in the summer or early fall when the grass has resumed growing again. We have a great article here that can advise on the best time and treatments for elimination. For specific timing in your region, we would suggest contacting your local cooperative extension
Quinclorac is a great active to use and it must be used with a methylated seed oil surfactant such as Duo Stick for best results. With QuinKill max that you purchased, the timing is key though, under certain conditions, application of QuinKill made to annual grasses at 2 to 4 tiller may not provide complete control. A sequential application will be required for grass control in these situations. Optimum control is achieved when applications of QuinKill + methylated seed oil are applied either before second tiller or as weed grasses mature.
What rate was it applied it? Do you know what tiller stage the crabgrass was at? How many applications have been made at what timing between them? What type of surfactant was used? Q is a slow kill and can take up to 6 weeks to kill.
Q4 is an alternative that can kill faster and Dimension as a pre-emergent is good, it also has early post emergent crabgrass control.
QuinKill Max cannot be used on Bahia or St. Augustine grass. If you need to spot treat, you can also always use a non-selective herbicide such as RoundUp QuikPro and then replant in those areas.
QuinKill Max Crabgrass and Weed Killer is not labeled to kill poa annua, or annual bluegrass. In fact, bluegrass is highly tolerant to quinclorac. QuinKill Max can be used for some broadleaf species, including clovers, dollarweed, and speedwell. For better control of broadleaf weeds, you will probably want to tank mix with another product with 2,4-D or Trimec, such as Fertilome Weed-Out Lawn Weed Killer with Trimec. Be sure to check the product label to be sure it is safe to use on your turf. If you would like more assistance selecting a product for your needs, please feel free to call our Customer Service team at 866-581-7378 M-F 9a-5p EST.
Yes, QuinKill Max is safe to use on buffalograss.
You could see results of a QuinKill Max Crabgrass and Weed Killer application as early as 7 days but can take several weeks for a complete kill, approximately 4-6 depending on the weeds.
QuinKill Max Crabgrass and Weed Killer can be applied 21 days after initial application. Per the product label, you do not want want to apply more than 128 oz over 1 Acre per year. The mix ratios vary so the amount of applications allowed would vary.
After speaking with the manfuacturer they have advised to use the Quinkill Max Crabgrass and Weed Killer to treat the crabgrass and to rotate your application with the Speedzone to prevent resistance of the herbicide. You can mix with Pendulum 3.3 EC to create a better residual effect. It is recommended to use a surfactant when applying the product to gain better control.
QuinKill Max Crabgrass and Weed Killer is labeled for use as spot application in established Bermuda turf as directed. As with most herbicides, the exact volume of water is not very important, you just need to be sure you are getting the correct amount of product on a specific area. Generally speaking 1 gallon covers 1000 sq ft, so you can apply 1.45 fluid ounces in 1 gallon for spot treating. It is recommended to apply with a methylated seed oil surfactant. It offers a kill to listed weeds and takes up to 6 weeks to kill sprayed weeds when used as directed.
QuinKill Max Crabgrass and Weed Killer is not labeled to control dallisgrass.
QuinKill Max Crabgrass and Weed Killer cannot be used on St Augustine grass, Bahiagrass, carpetgrass, or dichondra. Unfortunately, there really isn't a post-emergent crabgrass killer available for St Augustine grass unless you are willing to go to a higher price point. We do carry Echelon 4SC, and it is labeled for use on St Augustine. Still, the product label does warn "Application of Echelon 4SC to St. Augustinegrass may cause temporary discoloration to exposed leaf surfaces of St. Augustinegrass. Treated turfgrass will recover with new growth, and discolored leaf tissue will be removed with mowing."
The wait times for seeding with QuinKill Max Crabgrass and Weed Killer can vary depending on the type of turfgrass you have.
Please refer to Table 4 on the product label for information regarding seeding time before, during or after an applicaiton of the herbicide for the specific turf type you have in the area.
QuinKill Max Crabgrass and Weed Killer can be used on Kentucky Bluegrass lawns to kill clovers and many other weeds. The verbiage on the product label stating “DO NOT apply to Bahiagrass, carpetgrass, St. Augustinegrass, centipedegrass, dichondra, or lawns or turf where desirable clovers are present” would be referring to lawns that use clovers for desirable ground cover.
QuinKill Max Crabgrass and Weed Killer is not labeled to kill nutsedge or dallisgrass. Please let us know what kind of turfgrass you have so that we can better assist you with product recommendations.
