PrimesourceMeso 4 SC Select

I would highly recommend this as it has done wonders for my yard. I combined it with the--Adios! Spray Boost Surfactant for Herbicide and Weeds--when planting new grass, and it has absolutely demolished the weeds! I have the least amount of weeds in my newly planted grass, which if you have planted grass before is unheard of. I will be a returning costumer and am very pleased with this product. The rest of my lawn is now looking delightful and the weeds have been crushed into oblivion!

This meso really works even though you don't see full bleaching until a week in. And when the included syringe works out to 1 teaspoon product per gallon or 3.6 oz per acre, we probably should stick with that starting out. This is my first time using liquid mesotrione, and I went a little over to 1.2ish teaspoon mixed into a gallon tank for spot spray with no added surfactant or anything. Two weeks later, even my fescues were still very very white, lol. Used as directed, mesotrione is a wonderful thing for seeding time.

Okay, I've had a very tough lawn problem which, because I live in So. California, has been almost impossible to solve. The oxalis (kind of clover with little yellow flowers) has been coming in every winter and it has gotten so bad that you really can't see the St Augustine anymore. It all dies back by about April or May, but blocking the sunlight all winter is really done a terrible number on the grass. Anyway I finally decided I would try to get rid of it by whatever means necessary, except that most herbicides you can apply to St Augustine aren't available in California, and most of the things that are available in California you can't apply to St Augustine or don't kill oxalis. You see the catch 22 there?So this product says you really shouldn't apply it to St Augustine either, unless it's being grown "at a sod farm". Well that's puzzling to me I don't really get it, so I decided to take the risk cause I didn't have much to lose. I think the risk is it may turn your grass white. But that seems to be a temporary thing and the grass can come back.At any rate I sprayed it on at a point in Feb. at which you could really only see all the oxalis anyway. I hadn't mowed the lawn and at least 8 weeks to let the oxalis grow up above the grass. I tried not to get too much on the grass itself. About 3 weeks after the first application the oxalis had withered and turned kind of a yellow color but it was still there. So as directed I put on a second application. About 3 weeks after that and the oxalis is pretty well gone. So even though on the second application I got probably more of the product on the grass, the grass really wasn't harmed too much. It kind of is a bit on the pale side but not white, and even that is now starting to disappear and a deeper green is forming. It's been probably five weeks after the second application and the lawn is really looking great and there's very very few weeds of any kind in it. Pretty thrilled.So my basic message is, if you have St Augustine and you're at your wit's end you might as well try this even though the label says it's not a great idea. I really looked all over the Internet and couldn't find a good answer to this question.

Excellent weed control and what is nice is that you can use it multiple times a year with little risk to your grass. Also, very economical.

After I first applied this product on my lawn I was wondering if it was working when a few days had passed. Now after about 2 weeks my lawn is mostly white because it had so much windmill grass and this stuff really works. It really does stop the photosynthesis and the bad stuff turns white. Now I just have to reseed my lawn and keep the tumble grass at bay now that I know what it is and how invasive it is.

According to the directions, mesotrione can be used on the same day that new, cool-season grasses are seeded. I carefully applied the product according to the directions. The yellow nutsedge and crabgrass grew just fine, but most of the grasses died after they germinated (Kentucky Blue, tall fescue, perennial rye). This was despite the addition of proper amounts of nitrogen and water (twice daily) and a protective layer of a straw product manufactured for seeding. This was done in spring and the soil was kept consistently moist. My suspicion is that the lot of product that I received was not chemically pure. The product was applied at the coverage rate indicated at a concentration of 1 teaspoon per 2 gallon including 2 teaspoon non-ionic surfactant (Herbicide Helper). Some mature grass bordering this large patch was also killed to 100% while the weeds that were supposed to be killed mostly thrived. I believe the batch I received was defective. A sticker on the bottle reads "30010" which is possibly the batch. The bottle arrived in leaking condition. I wish I would have just returned it.UPDATE: I have made my rating neutral to 3 stars to reflect new information. In September, there was a large emergence of a somewhat rarer insect pest in the area, craneflies. There is a good chance that they could have eaten the roots of the turf grass. However, this product still did not help with crabgrass or nutsedge, so marking it up from 1 star to 3.

It came in a little bottle, but it's very potent. Three eye droppers for 18 gallons of water. Works best after the second application.