3 weeks We're sorry to read about your disappointment with Ortho Weedclear Lawn Weed Killer Ready-to-use With Comfort Wand and appreciate your feedback. Visible results can be seen after 24 hours. This product takes a minimum of 3 weeks to completely kill weeds.

Although visible results may be seen within hours, this product takes 2-4 weeks to completely kill weeds. We want you to be confident in our products. For this reason, we offer a product guarantee to our consumers. At your earliest convenience, please reach out to us at 866-324-9192 if we can further assist.

The liquid herbicide enters through the leaves and works through the plant to kill and control all the way down to the root. To use, install the Ortho® Trigger Sprayer from the side of the bottle to easily reach and spot-treat weeds with your desired nozzle setting.

Apply using a tank sprayer: Add 2 fl. oz. of Ortho® WeedClear™ Weed Killer for Lawns Concentrate per gallon of water to treat 500 sq. ft.

Right into your tank. And then right here it says we're going to add well basically every gallon of water is for 400 square feet. So this tank that I have right here is actually just one gallon.

Ortho® WeedClear™ Lawn Weed Killer Ready-To-Use1 controls and suppresses over 250 types of weeds, including major broadleaf weeds (see label for list), dandelion, clover, oxalis, chickweed, and spurge, yet won't damage your grass (when used as directed).

Some herbicides need a dry, rain-free period of up to 6 or 8 hours for the solution to soak in, and these requirements should be indicated on the package. Other stronger brands like Roundup only need 30 minutes on the leaves to be effective, and rainfall after that time won't stop the product from working correctly.

Some products may take effect within hours or days, while others may require weeks or even months before they start showing results. While you may see results in as little as a few hours, most spray-on weed killers usually take 5 to 7 days. But they can take 14 to 30 days to kill the weeds entirely.

Right into your tank. And then right here it says we're going to add well basically every gallon of water is for 400 square feet. So this tank that I have right here is actually just one gallon.

Ortho® Weed B Gon® Plus Crabgrass Control is guaranteed to kill crabgrass, dandelions, and other listed common lawn weeds right down to the root. But here's what makes Ortho® Weed B Gon® Plus Crabgrass Control so cool: it's tough on over 200 listed weeds, but won't harm your lawn when used as directed.

You Will Need: 1 litre of white vinegar (here's where I buy vinegar in bulk). 3 large tablespoons of salt. 3 teaspoons of washing up liquid/dish soap (preferably a more environmentally friendly brand that is not antibacterial – I used Bio-D and it did the job).

Conditions should be dry and calm when spraying the weed killer and wet weather may delay the treatment or make it less effective in some areas. Weed applications are generally undertaken via knap-sacking (use of a backpack containing the specialist herbicidal treatment) or through a mobile applicator.

To effectively kill weeds, it's recommended that you spray 30 minutes to an hour before rain, if not earlier, depending on the brand you choose. After it rains, wait for the leaves to dry out before spraying, or the herbicide may be washed away.