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How Long Does Ortho Weed-B-Gon Take to Work?

Weeds are the bane of any gardener’s existence, frequently growing more vigorously than the desirable plants and grass in the landscape. At flowerbeds, you can frequently keep them under control with dedicated weeding sessions, ripping out their origins by hand. But when they begin taking over your lawn and every pavement crack, it may be time to break out the herbicide. Ortho Weed-B-Gon will destroy weeds before they wreak havoc on your garden.

Weeds in the Grass

The most troublesome kinds of weeds to eliminate are the ones which grow in your lawn, because you run the risk of not only killing the weed but also the rest of your grass too. Weed-B-Gon Weed Killer for Lawns Plus Crabgrass Control may be applied to your lawn any time weeds are actively growing. Active ingredients are .10 percent quinclorac, .22 percent MCPP-p, .12 percent 2,4-D and .05 percent dicamba. Be sure the daytime temperature is over 45 degrees and under 90 degrees Fahrenheit when applying, and wait an hour following application to water your lawn. Most weeds will show signs of wilting or yellowing of new development within a day of application. Necrosis will disperse, turning hardened brown and also killing them within 14 to 28 days. If seeds were completely developed before the weeds die, they will continue to be feasible, however. This means new weeds will crop up from seeds, requiring additional treatment. If you’re dealing with particularly stubborn weeds, another application two to three weeks afterwards may be necessary also.

Weeds in the Landscaping

Grassy weeds which populate your landscaping can be tough to remove by hand. In tiny flowerbeds, it is possible to manually get rid of the grass, but bigger areas may need an herbicide such as Ortho Grass-B-Gon Garden Grass Killer. Its active component is 0.48 percent fluazifop-p-butyl. For best results, spray weeds anytime they’re actively growing and repeat again seven days later to control crabgrass, quackgrass and Bermuda grass. Grass-B-Gon may be safely used around ground covers, plant beds, landscapes, flowers and shrubs and also works within one to four weeks following application.

Weeds in the Pavement

Weeds in pavement cracks, along fences and driveways are a lot simpler to kill because you don’t have just as much surrounding vegetation. Ortho GroundClear Vegetation Killer works in such spots. Its active ingredients are .016 percent imazapyr and 1.0 percent glyphosate. For smaller regions, the ready to use formula can be sprayed on weedy offenders when they’re actively growing. Best results are achieved when implemented on a sunny day once the temperature is between 45 degrees and 85 degrees F. Long Sensors must be cut down before application. Weeds will yellow and wilt within 10 hours. They’ll be dead in one to two weeks and shouldn’t grow back for a single year.


Don’t use Ortho GroundClear over root zones of trees of shrubs or even where it is likely you might later plant. On clay soils, the product deposits may remain in the ground for up to one year. When using any herbicide, follow all mixing directions and safety precautions printed on the tag. Keep children and pets from the region until the spray has dried.

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