QuinKill Max Crabgrass and Weed Killer - Questions & Answers

QuinKill Max Crabgrass and Weed Killer  may be used as a spot treatment or broadcast spray over turfgrass, including Fescue, Rye, Bermuda, Zoysia if used as directed. Do not apply to to Bahia-grass, Carpet-grass, St. Augustine-grass, Centipede-grass, Dichondra, or lawns where clovers are present.

Per the product label, "The use of QuinKill Max Crabgrass and Weed Killer before or after seeding or over-seeding a turf area will not significantly interfere with the turf grass seed germination and growth of those grass types identified as tolerant or moderately tolerant in Table 1. Consult Table 4 for timing of applications concerning any seeding, overseeding or sprigging situation".

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.

Depending on what you are treating, one pint of QuinKill Max Crabgrass and Weed Killer will treat approx. 10,000 sq. feet

Tenacity is typically the choice for a pre-emergent herbicide needed when seeding or overseeding a lawn, particular tall fescue or other cool-season grasses. For QuinKill Max, you will need to consult the chart on pages 15-16 of the product label for appropriate timing depending on the type of turfgrass. Some grasses are more tolerant of this herbicide than others.

The label states to use 1.45 oz QuinKill Max Crabgrass and Weed Killer per 1000 square feet. You also must know that when using an herbicide such as QuinKill Max Crabgrass and Weed Killer is that the exact amount of water you dilute it with is not important. It is only important to make sure you are using the correct amount of product per 1,000 sq ft of lawn. Use too much and you risk damaging your lawn, use too little and you will not get adequate results. You will need to use 1.45 oz per 1,000 sq ft . To decide how much water you want to use, you should mark a 1,000 sq ft area, fill your sprayer with WATER ONLY, and start walking and spraying just as if you were doing the actual application of herbicide. When you are done walking and spraying the 1,000 sq ft area note how much water it took you to spray that area, and that is the amount you will want to mix 1.45 oz of product with for each 1,000 sq ft area that needs to be treated.

QuinKill Max Crabgrass and Weed Killer will kill grassy weeds like crabgrass, foxtail, signalgrass, torpedograss, and others listed on the product label.  You may refer to the product label for a complete list.

QuinKill Max Crabgrass and Weed Killer is labeled to eradicate crabgrass. Some species of bentgrass are more tolerable than others. Please refer to the product label for more details on application and tolerance including Page 12.

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 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