GroundClear Weed & Grass Killer Super Concentrate1 Fast-Acting Formula Kills the Toughest Weeds and Grasses, 32 fl. oz.

Works well, good price

I’m quite impressed! I’ve used this style of container and electric pump with bug spray so I figured it would be an easier way of killing some weeds and grass. We tried weeding by hand but it took forever and grew back in a few weeks. So I read some reviews and went for this product. Works super well. Some reviews noted it didn’t work in 15 mins like some of the product photos showed. Mine didn’t either. I gave it a day/overnight and the grass I sprayed died. Within two weeks or so the dead grass flopped over and blew away or is barely noticeable. I attached a photo showing my initial test area. I started in one area where the grass was pretty thick on my walkway. So ugly. We have large stones as steps, then some small pebbles between them with dark mulch on either side. You can clearly see where I started and specifically left the upper area alone for comparison. I love it! It killed the grass I sprayed and didn’t discolor the large stones, small stones or mulch. I also sprayed in areas with pine type bushes and it didn’t bother them. I kept it away from flowers but sprayed near the base and they were fine too. I highly recommend. I sprayed each section twice. Nothing overly heavy but “wiggling” it back and forth as I sprayed. Aimed at the base of the grass then the upper “leafs.” Worked better than expected. I used two containers to do a backyard patio with much larger stones and then the front walkway. I don’t know longevity but it’s been 3-4 weeks and in those areas, no grass has come back. I will need to spray a little next year I’m sure when new grass seeds float around but hopefully nothing this bad. Highly recommend!

We live on just over an acre in central Arizona and moved into an area that is infested with Silverleaf Nightshade (Solanum elaeagnifolium, or aka Horesenettle) which is a toxic, tough, nasty, perennial weed from the Nightshade family, poisonous to both humans and animals if ingested, especially the numerous yellow berries it produces. It spreads quickly through an extensive tuberous and woody root system and has sharp tiny painful spines covering the entire stems and even leaves. It is extremely difficult to control and requires numerous treatments and vigilance to eradicate as it pop up everywhere from the central sytem. This Ortho "super concentrate", which works down through the root sytems of these broadleaf obnoxious weeds (and many others), is one of the few effective controls I have found. Glycophosphate-based (the basic "Roundup types", etc) weed killers will only give temporary control. It is cost-effective compared to the pre-mixed stuff, especially if you have large areas to cover. Be careful when using it as it contains 2,4-D and Dicamba (3,6-dichloro-2-methoxybenzoic acid). Do not use near any sensitive or wanted plants when temperatures are above 80 degrees, or even a slight breeze, as 2,4-D and Dicamba will vaporize and drift onto them, damaging and even killing them as well. I know, as the volatilization killed a few of my young grapevines when I used another weed killer (Crossbow) containing 2,4-D when it was 95 degrees. This applies to weed killers carrying Triclopyr as well, so read and adhere to the instructions and BE CAREFUL.

Fast working

This showed fantastic results just 24 hours later. I didn't expect it to work so well so quickly. My photos show crabgrass where I sprayed and crabgrass where I didn't spray. I didn't spray everywhere because I figured I'm doing a test where I would compare results in a week. Only took 24 hours. Only problem is, now my grass has so much brown in it because this product killed off so much crabgrass. I bought it for Goosegrass as well and it's killing those as well. A tad slower than the crabgrass, but still working great. I've tried other products for crabgrass in concentrate form and they didn't work half as well as this. I have a hunch you're supposed to add a surfactant with concentrate, but this ready to go product had everything all mixed. All you do is flip the safety lock and spray. I was so impressed I will now look at Ortho's backyard bug killer.