Quinclorac 75 Herbicide - 1 Pound (Drive 75, Quinstar) by

I've been battling crab grass unsuccessfully for years. I've always known quinclorac is what you use to treat it, but didn't know the big box store herbicides don't contain enough of it to work until YouTube's Lawn Care Nut advised as such. So I bought this stuff. And it works. Fast. My crab grass was dying or dead within 3 days of application. Make sure you use a surfactant with it, or you won't get good results. The manufacturer recommends Methylated Seed Oil, but I used a non-MSO one and had great results.The cons to this product are minor gripes. It's expensive compared to its big box store counterparts, but it is cheaper than competing name brand pro level quinclorac products while being just as effective. So don't balk at the price compared to something like Weed-B-Gon. This is a pro-level product that is far more powerful, so this it what that strength costs. Based on how much I use, this one bottle will last years, so it's actually a pretty decent deal. The other con is that being geared towards pros, the directions are indecipherable to us lay folks. Something as simple as how much to use with a residential 1-4 gallon sprayer can't be easily determined. I'm grateful to other reviewers here on Amazon for figuring that out. Bottom line: use one tablespoon of product per gallon of water. Don't use in heat 90 degrees F of higher (I personally try to avoid spraying over 80F). And observe the recommended wait time between sprayings should you need a second application (I didn't).

Does fight crabgrass. Still, you're in for a battle. Crabgrass is grass, so it's tough to kill separately from your beloved lawn grass. Timing is everything - early in the spring, hit it BEFORE crabgrass can start to emerge and take hold. I hit it again in a couple/few weeks.It seems to work better as a pre-emergent killer rather than a spot killer for existing outbreaks. I've been at it for about 3 years now, and it's gotten better every year. Where the crabgrass was concentrated, now I have left behind nearly brown, very sparse grass areas. Once I'm sure the crabgrass is wiped, I'll probably scratch it down to the soil and seed.As others will / have pointed out, mix in a little surfactant to allow the mixture to penetrate and overcome the water's surface tension better.

This is a great way to go if you're looking for an affordable way to fight select weeds. The product works well on the plants listed. However, I'm no horticulturist...so I don't know my weeds all that well. I kept trying to spray what I could have SWORN was crabgrass. Looked just like it, to me... big clumps of thick, nasty grass growing in bunches all through the lawn. None of the selective herbicides I tried would even phase it. Turns out, the "crabgrass" is something more like a course Fescue (or some other variety of invasive Fescue), and thus immune to this product. Anyway, just thought I'd share that bit of information in case someone else runs into a similar scenario and is tempted to complain that this product doesn't work. It actually works really well.My ONLY complaint is the mixing instructions (and therefore the 4 stars). I realize they want this to be used by pros... I get it. I also realize that you're restricted in the amount of this product you're allowed to spread over a certain area of land per year. But for crying out loud, can't you just give some instructions for an optimal mix? Tell us how many tablespoons of this stuff per gallon of water. Make it simpler. This whole so-many-ounces-per-square-feet nonsense just complicates the process, and probably lends to people using too MUCH of the product in an effort to "be on the safe side and be sure there's enough in there."I'd also echo what just about everyone else with success had noted: Use an adjuvant ("surfactant") to be sure this applies nice and evenly. I went with the recommended Methylated Seed Oil (MSO) and had great success.

This stuff WORKS! My Girlfriends lawn was in really bad shape from previous owners. This October will be one year since she moved in and it's been a year in the making getting this yard back into shape! She had a major ant and grub issue. I got the grub issue under control pretty quickly but the ant problem was tough. I used Talstar Pro for ants. Took numerous applications, but the ants are gone! The yard looked beautiful EXCEPT for the crabgrass that completely took over! I tried the Ortho Crabgrass Control, and it did work, it just didn't provide the punch I needed to kill this stuff! I will give Ortho credit where it's due....it did work FAST! Within 24 hours, crabgrass was turning brown. If there wasn't so much of it, Ortho might hav been enough. After researching crabgrass control, I almost bought the Drive product....but it was a bit too pricy. I came across Quinclorac 75 and figured I'd give it a shot. This stuff WORKS!!! It doesn't work FAST, but every single piece of crab grass I sprayed it on turned brown after a week in a half! Fast forward 3 weeks, still killing the crabgrass, not a live piece anywhere....and the good grass is unharmed!! :) I love this stuff! This stuff WORKS, just be patient! On a final note, I have a 2 Gallon sprayer, I mixed it 1.5 tsp per gallon of water. This is a granular product that mixes with water. I also didn't use any surfactant...only product and water.