Ortho WeedClear Lawn Weed Killer (South) (2024)

FAQs

Ortho WeedClear Lawn Weed Killer (South)? ›

Roundup For Lawns4 is a tough weed killer for use on Southern grasses that kills weeds, not the lawn (when used as directed). This product kills 93 types of weeds, including dollarweed, dandelion, clover, and yellow nutsedge (see inside booklet for weed list).

Roundup For Lawns4 is a tough weed killer for use on Southern grasses that kills weeds, not the lawn (when used as directed). This product kills 93 types of weeds, including dollarweed, dandelion, clover, and yellow nutsedge (see inside booklet for weed list).

The herbicide is specially formulated to kill weeds all the way down to the roots and won't harm the lawn when used as directed.

This product takes a minimum of 3 weeks to completely kill weeds. In addition, temperatures below 60 degrees or above 90 degrees may cause weeds to be dormant. If you didn't receive results in that timeframe, please reach out to us at 866-324-9192 if we can further assist or help troubleshoot.

If you see small weeds starting to creep into your precious green space, spray Ortho® WeedClear™ Lawn Weed Killer Concentrate (as directed on the label). It's rainproof 1 hour after applying it, and it kills over 200 weeds at their roots.

Tenacity herbicide is an industry favorite for killing weeds in your lawn without killing your grass. Optimized for cool-season turf, Tenacity can be used as a pre and post-emergent herbicide control for over 46 broadleaf weed and grass species.

Ortho GroundClear Year Long Vegetation Killer is expected to kill weeds and prevent any re-growth for up to 1 year with a single application. Do not apply to the same area more than once a year.

Both Ortho Ground Clear and Roundup contain glyphosate which can both kill weeds that are invading your garden. The only problem is that Ortho Ground Clear contains imazapyr, which is known as an active root herbicide.

What time of day is best to spray weed killer? ›

In both the burndown and in-crop studies, the most effective timing was usually midday, followed by midnight. Coles says, “Since night spraying was usually more effective than dawn, night spraying could be a good option when daytime opportunities for spraying are limited.”

Summary: Some herbicides are more effective when applied at noon compared to early morning or late evening applications, new research indicates.

The lawn can become very sick or even die in areas if herbicides are applied to newly mowed lawns, so the general rule is to wait for one week after mowing before applying weed killers to the lawn. Also, wait one week after applying weed killers before mowing the lawn again.

Using Bleach to Kill Weeds Permanently

Apply one cup of bleach, undiluted, to the afflicted area. Wait until the weeds turn brown before pulling them out of the ground. Run water around the area to flush the bleach, especially if you are trying to grow plants or grass in that area.

What natural weed-killers kill weeds down to the roots? Boiling water and flaming will kill the roots of weeds. Vinegar kills roots, but it may take a few days for the roots to die off after the vinegar solution is applied.

Yes, using vinegar weed killer can help control weeds, which can be a win-win if you're looking for products that are less harsh on the environment than many synthetic herbicides. However, you wouldn't want to use this acidic liquid in all areas of your landscape because it could damage any plant it touches.

Summary. Glycosulphate is the strongest weed killer chemical on sale and will kill grass too, but most gardeners won't need a product this strong as more targeted chemicals are nearly as effective.

The best garden weed killer will not harm surrounding plants or damage the soil so plants can't grow there in the future. Remember, pre-emergents stop weed seeds from sprouting. Check the label for a list of specific weeds. For best results, apply pre-emergents before the weeds germinate in early to late spring.

Just spray until wet, it doesn't need to bead or puddle up. And keep pets & children out of the treated area until it's dry, about 1-2 hours.

What are the warnings for Ortho Ground Clear? ›

PRECAUTIONARY STATEMENTS HAZARDS TO HUMANS & DOMESTIC ANIMALS WARNING: Causes substantial but temporary eye injury. Do not get in eyes or on clothing. Wear safety glasses.

Roundup is banned in more than 20 countries because the herbicide has been linked to an increased risk of non-Hodgkin lymphoma and other types of cancer.

Organic Roundup alternatives include herbicidal soaps that use fatty acids to kill weeds and industrial vinegar, which contains much higher levels of acetic acid than what you have in your kitchen. Acid-based herbicides burn down some young weeds. Corn gluten meal can kill grass weeds and broadleaf weeds.

The best time of year to use weed killer is Spring, followed by Fall. Spring is an effective time for catching weeds in their pre-growth season, in order to prevent them from sprouting. Fall is similarly effective because, ahead of the Winter, this is when weeds are most vulnerable.

IMPORTANT: Do not use before planting lawns, fruits, vegetables, flowers, or other plants because [Product Name] remains active in soil for up to one year.

If applied very carefully, a broad-spectrum herbicide such as glyphosate (RoundUp) will kill crabgrass. Take care not to allow the spray to drift, as this chemical will also kill desirable turf grasses.

Thus, it is best to avoid applications of postemergence herbicides during periods of cool temperatures (<40°F at night; <55°F during the day). High temperatures increase the loss of volatile herbicides.

Answer: It is never too late to spot spray weeds in the lawn with Roundup (glyphosate). Just a note that spot spraying weeds will likely create small dead spots in your grass. The grass will grow into those spots over time.

Effect of Temperature on Herbicide Efficacy

The ideal temperature for applying most post-emergence herbicides is between 65°F and 85°F; however, that window is not always practical with other fall practices. Herbicides can be applied at temperatures of 40°F to 60°F, but weeds may be killed slowly.

When should I put weed killer down on my lawn? ›

For the most effective control, apply in early fall (September 15 - October 15) or in spring (late April - early June). Fall is preferred over spring due to greater penetration of the herbicide down into the roots and the reduced possibility of damage to flowers and other vegetation.

Applying weed killer isn't a one-time thing. It needs to happen multiple times a year. Different weeds grow at different times throughout the seasons. That's why you get five visits throughout the year in our comprehensive lawn care programs.

Do not apply a weed killer right after mowing. Mow, then wait a minimum of two to three days to apply the weed killer.

Granular weed killers should be applied when grass is damp and should not be watered for 48 hours after application. The dampness of the grass ensures the granular weed killer will "stick" to the leaf.

You need to wait for the leaves to dry before spraying for the product to work. Applying right after rain is similar to spraying before the rain, simply because the weeds are still wet and the herbicide is washed away. The droplets of rain can also dilute the herbicide and make it less effective.

Weed control products and fertilizers are useful tools to keep your grass looking thick and green. However, you need to treat those weeds before moving on to the fertilization stage. With this combination, you can keep your outdoor spaces looking well-maintained throughout the year.

A: Roundup for Lawns Southern can be used on the following grass types: St. Augustinegrass (including Floratam), Bermudagrass, Buffalograss, Centipedegrass, Seashore Paspalum, Bahiagrass, Zoysiagrass, Kentucky bluegrass, Tall Fescue, Red and Fine Fescue.

According to Purdue University Turfgrass Science, liquid sprays tend to be more successful than their granular counterparts, simply because the liquid formulation is sprayed across the weed's leaf surface and does not rely on additional moisture to stick to the leaf.

Glyphosate Weedkiller destroys the roots of the weed, eliminating the plant for good, and preventing recurrence. It is effective on virtually any weed or unwanted vegetation including: Dandelions.

Summary: Some herbicides are more effective when applied at noon compared to early morning or late evening applications, new research indicates.

Is it better to apply weed killer before or after mowing? ›

Don't mow the grass before applying weed killers.

Plan to leave your grass uncut for five days before application and two days after. Stay off your lawn for one day after application.

Organic Roundup alternatives include herbicidal soaps that use fatty acids to kill weeds and industrial vinegar, which contains much higher levels of acetic acid than what you have in your kitchen. Acid-based herbicides burn down some young weeds. Corn gluten meal can kill grass weeds and broadleaf weeds.

Use Ortho #1 weed killer for St. Augustine grass lawns, including Floratam.

The main reasons are pests like grubs and chinch bugs, turf diseases like brown patch and gray leaf spot, poor soil quality, and excessive fertilizer applications.

Summary. Glycosulphate is the strongest weed killer chemical on sale and will kill grass too, but most gardeners won't need a product this strong as more targeted chemicals are nearly as effective.

Typically, even heavy rain after a lawn treatment, in the case of granulars, won't hamper their work.

LESCO St. Augustine Weed and Feed 17-0-7 with Penoxsulam is a two-in-one solution to control dollar weed, chickweed and other post-emergent weeds while also fertilizing your lawn. This ready-to-use bag covers up to 14,000 square feet of turfgrass in a slow-release formula.

The acetic acid in even household vinegar was MORE toxic than Roundup! Going one step further, in this case a comparison of rate of application is a moot point. A 1% solution of glyphosate will kill most any annual weed listed on the label, and also the majority of perennial weeds.

WD-40. Don't let pesky prickly weeds like bull and Russian thistle ruin your yard or garden. Just spray some WD-40 on them and they'll wither and die.