Prime Source Celsius WG - 0.226 oz Easy Mix Packet-Post Emerge Weed Control

The most effective selective herbicide I've used. Get yourself a two gallon hand pump or electric sprayer, some surfactant, mix it up and you're ready to go. As others have said, it works slowly but it's very effective. Bonus, it's less expensive than the common brands at big box stores when you consider you get two gallons out of one packet. Be sure to use it in the right conditions (season/temperature/precipitation/wind) for best results.

I used this to take care of some different types of weeds that were in my lawn that consists of Bermuda and st augustine. It said it was safe to use the type of grass and it didn’t hurt it at all. It was easy to use. When I applied it I didn’t notice a difference the first few days, but then probably after about a week the weeds started to shows signs of wilting and drying out. Then after 2 weeks I could tell that most of the weeds were mostly brown compared to the green grass. I did notice some weeds were still alive but I probably missed them the first time I sprayed but that’s on me. I would recommend spraying another time maybe after to 2-3 weeks to ensure that the weeds are killed. This product is really good at what is does it killed weeds that I didn’t know were there. Overall I recommend this product if you have weeds in your lawn.

This did an amazing job on Wild Violets. I prefer to pull weeds but there were too many, so I gave this a try. You can see in the before and after pictures how effective it is. I think the secret is to wait several weeks. It isn't going to work overnight. It was also very effective at killing Field Madder. After using this I'm mostly left with Bermuda grass which is what I want.

Loved how effective this is. Most people, I read, mix it with certainty herbicide but that was too expensive for my individual use. Just used this handy little packet perfectly priced for a 2 gallon mix to which I added a little surfactant. Covered about 2k sq ft. It has started to kill weeds I have no idea what they are called ( mostly broadleafs). Slow acting but it surely looks like is very effective.

We have some very obnoxious weeds that don't respond to standard herbicides. Researching the varieites, it appeared Celcius was probably the best choice. It worked great on the dichondra, but had difficulty with the Dalias Grass (which is almost impossible to kill unless you use round-up). One needs to be careful as it can hurt centipede and zoysia -- we did see a bit of yellowing, and stunted growth for a month or so, but the grass recovered nicely, and 4 months later shows absolutely no sign of damage. Knowing this, I did not want to spray the entire lawn and only wanted to spot kill in the few areas we had problems. Celcius is used commercially a lot, so most offerings were for much larger quanties than I'd ever use, and it is rather expensive. These small packets were a perfect choice.

Happy with this weed killer. Takes a little time for it to work, but works well. Within a week after applying, weeds were yellowing. After 2 weeks, they were drying up. Used it in a tank sprayer as spot treatment. Never harmed the St Augustine or Bermuda grass. Would use again

Pretty good weed killer, works slow but it works.

This herbicide worked very slowly, but it did eventually work. I used it on dandelions, and I ended up pulling many of them. It takes a while to completely kill the weeds. Instructions were helpful and easy to follow. I made two applications. I recommend marking dye and a non-ionic surfactant for spot spraying. Value depends on your use case. Packets are good if you have a small yard and/or just want to try it out. They are not economical for larger yards. It mixed well in my 2-gallon hand sprayer.