Now, two weeks later, I want to plant shrubs there. Did you plant seed, or seedlings? Colored mulch sprays are easy to apply and will rejuvenate the look of already-applied mulch if its color has faded. Preen has no affect on existing weeds, it only affects seeds and newly establishing weeds. Sure. After spraying with Tenacity Herbicide, the foliage of treated weeds cease growth after application, then turn white (loss of chlorophyll), and death may take up to three weeks.A repeat application is required after two to three weeks for improved postemergence weed control. What can you use instead of Roundup? Close-up of undersized foliage and buds that failed to open. Mulches also help to prevent the spread of disease and insect infestations, as well as reduce the amount of water that is lost to evaporation and condensation. WebThen Roundup Max Control 365 products are your answer. The organic matter traps heat and water. Besides the active ingredient glyphosate, the Roundup [12], The United States Forest Service says that the herbicidal properties ofGlyphosate are not available once it is in the soil. Better yet, dedicate a particular sprayer to Roundup use only. After 30 minutes, the product is rainproof, and the weeds should begin to wilt and yellow in about three hours, with a complete kill down to the roots in one to two weeks. hmmmm. However, remember that some herbicides may require several sprays at different intervals. If you want to prevent future weed growth, prepare your garden by killing weeds and installing landscape weed control. [9], If the weeds are small, you can smother them with mulch. Does anyone have mulch on sale right now? WebThe consensus determined that Roundup stays active in the soil for at least six months. This allows sufficient time for the broadleaf weeds to absorb the herbicide and translocate it to their roots. Flush all parts of your sprayer with water after use to prevent accidental Roundup application the next time you use your sprayer with a different product. Wait a week or two after planting to apply postemergents because they are the most effective on plants that are not under stress. I know some weeds need two sprayings of roundup but hopefully the preen will keep them down. My question would be why are you spraying, AND tilling? Glyphosate products should not be used on mulches. If you have a lot of trees or need to mulch larger areas,RoundupWeed & Grass Killer Concentrate Plusmay be a more economical solution. If it rains before the product sits for six hours, reapplication is required. Does it linger in the soil? You can spot- spray anything that pops up in your yard. This is because noon heat hinders plant development and chemicals dry out quickly on the leaves. Knowing how much mulch to use can be tricky. If weeds pop up and leaves grow after mowing your lawn, wait three to five days before respraying weed killers to allow leaves to regrow. When weeds are small, less than 6 inches tall, and others, like glyphosate, work best when the plant is about to [14], If you want to reduce weed growth through your mulch, you can use old newspaper in place of the black plastic weed barrier. It's how round up works. WebIt can persist in soil for up to 6 months depending on the climate and the type of soil it is in. WebHow long should you wait to mulch after spraying Roundup? EPA classifies glyphosate as Generally Recognized as Safe (GRAS), which means that it is safe to use in most situations. The use of pesticides on plastic mulch is against the law. [13], If you used the herbicides according to the directions, you should not have a problem using your compost. WebRoundup Super Concentrate Weed & Grass Killer is a great value for large areas. For example, a mixture of 1 part organic herbicide to 4 parts water may be a good choice. WebHow long should you wait to mulch after spraying Roundup? Mulch colorant, a spray solution, comes in a variety of eye-catching colors, including hues of gold, red, brown and even black, such as those made by Enviro Color, sold at Home Depot and other stores. You should wait before planting a food plot or reseeding an existing food plot area with a non-glyphosate herbicide such as Terrazole. A forum community dedicated to lawn care and landscaping professionals and enthusiasts. Roundup: Precision Gel Weed & Grass Killer, Roundup: Ready-To-Use Weed & Grass Killer III With Sure Shot Wand, Roundup: Roundup Concentrate Poison Ivy Plus Tough Brush Killer, How to clean a showerhead, according to an expert, Killzall Herbicide Application Instructions. Mix in topsoil to improve soil quality and help new sod or grass seed get off to a good start. The plants leaves, stems, and roots are attacked by the active agent, which is in the form of isopropylamine salt. (Check This First). But if you dont want to spray, then youll have to do it yourself. [18], Spring is a good time to apply traditional mulch because it breaks down over the course of a year. WebHow To Stop A Dog From Eating Mulch? Always follow label directions for application rates and safety precautions. If you are mulching to protect plants from winter freezes, apply mulch in the fall. WebRoundup's website advises that you wait three days after initial application before planting vegetables in a treated area. Glyphosate's half-life (the time it takes for half of the active ingredient to degrade) is between 3 days and 19 weeks depending on water conditions. Most herbicides have a recommended waiting period of two days before you can mow your lawn. WebAfter several days, the effects of Roundup in soil become harmless to vegetation. If weeds remain after the initial treatment and you choose to reapply the product, will need to wait another three days. Whether its your flower or vegetable garden, nobody wants weeds to take over. Its not necessary to put down new mulch, as there are cost-efficient alternatives that will allow you to regain the mulchs former vibrancy. That's usually a matter of 72 hours at the most -- perhaps longer in rainy weather. Like Save Bert9999 J thanked Tom gardengal48 (PNW Z8/9) 5 years ago It depends entirely on the RoundUp formulation used. The Tractor supply brand states the area can be overplanted in 7 days, but I wait 2 weeks just to make sure. Photo: S. Feather, Penn State -Ron According to Scotts, the manufacturer of Roundup (glyphosate) weed killer, its safe to plant ornamental WebIf the weeds are small, you can smother them with mulch. If hit with Glyleave it for at least 3 days, Gly is a contact and it takes time to get through the system. Too When weeds are small, less than 6 inches tall, and others, like glyphosate, work best when the plant is about to flower, post-emergent herbicides work best. WebWarm climates. There are several options available, including a concentrated formula that you mix and ready-to-use containers with several wand styles. If you decide to use Roundup spray as a weed killer, you dont have to wait to mulch or dig it up later. Once you spray the mulch with Roundup, most weeds will die quickly. Keep in mind that you cannot spray any weeds that pop up later. The injury can continue for a number of years after the misapplication. Mulching is a great way to keep your garden looking beautiful and healthy. If using a tank sprayer to apply any Roundup product, use one made of fiberglass, plastic, stainless steel or plastic-lined steel. Avoid inhalation as well. Wait 5-7 days after spraying Roundup before starting to till up the plots. A thick layer of mulch applied to garden areas after hand weeding will prevent weeds from reseeding or emerging a second time. Do not spray on windy days, as drift can damage nearby plants. If you decide to use a weed-killer up front, you dont need to wait to mulch or dig it later. All rights reserved. Never seen a bed no matter how thoroughly prepped be weed free past a month. Roundup herbicide takes much of the toil out of weeding a garden, eliminating the need for hoeing or hand pulling. (If the problem was caused by a spilled chemical such as gasoline or an herbicide, remove several inches of surface soil.) It is better to remove the weeds and grass before adding mulch. 5. Roundup products have come a long way since that original bottle of glyphosate weed killer in the '70s. Copyright Leaf Group Ltd. // Leaf Group Lifestyle. Plants inadvertently sprayed with Roundup can be immediately washed thoroughly with water to prevent the glyphosate from being absorbed by the leaves. You should always kill weeds before mulching your garden beds. Combining her interests in both of these fields, Kilpatrick is a professional flower grower and a practicing, licensed mental health therapist. WebTo do this, spray Roundup Ready-To-Use Weed & Grass Killer III, then wait just 24 hours before proceeding with your project. How long does Roundup stay active in the soil? And I always rinse the sprayer after use, to keep metal parts from corroding. Video of the Day. 4. For 20 years, shes owned a garden center and landscaping/consulting business and holds numerous horticulture certificates. The herbicide will dry on the vegetation faster and it will be less likely to blow to areas where the herbicide treatment is unwanted. Dont expect mulch to eliminate well-established weeds when you get rid of weeds first. The product targets more than 90 common weeds affecting turfgrass, killing them down to the root. Mulch is also a great way to keep weeds out of your garden beds and prevent them from spreading to other areas of the yard. Water after mulch is an optional step, but a final watering can help settle the mulch into place. There are many different ways to border your mulch ring. And keep the ring several inches from the trunk. To use mulch as a natural weed barrier, you need to put down a 2- to 3-inch layer. Mulch colorants can be found at your local lawn, garden or hardware store. ), Stay Toasty On-The-Go With Tikis Portable Fire Pit, Ask Danny: Ep. If leaves pick up Glyphosate through rain run-off or windborne spray, the trees would be vulnerable to damage. A forum community dedicated to living sustainably and self sufficiently. You simply mix the solution in water, then use a standard garden sprayer attachment that fits around your garden hose to evenly disperse the solution on the desired area of mulch. Clearly Explained! Gramoxone, which is quickly broken down by sunlight, should not be broadcast over the mulch. Glyphosate can stay in soil for up to six months, according to the National Pesticide Information Center. When we use Roundup on new plots, we put ANTLER KINGS PLOT MAX in the same tank as the Roundup and with one pass, we apply the PLOT MAX and also apply the ROUNDUP and kill the existing weeds. If the seed, then, if they have not emerged, then, you could risk it. It is not necessary to protect the area after spraying, as the freshly misted mulch will dry almost immediately. What are proven ways of controlling weeds in your garden Mulch Wait to spray Roundup on a day that is sunny, dry and with no wind. What can be used as fuel garden mulch and packing material? If you want to smother weeds and kill off roots without hand weeding, you must make it thick. Distilled, white, and malt vinegar are all good for weed control.[20]. Mulch and Soil Council: Are Mulch Colorants Safe? Can I combine Butyrac 200 & Clethodim, and spray them at the same time? Killing weeds and installing landscape fabric before mulching will prevent future weed growth. [2], A thick layer of mulch applied to the garden areas after hand weeding will prevent weeds from re-emerging. WebRegular Round Up is NOT long term weed control. Her work appears in SpaceCoast Living magazine, Atlanta Constitution Journal, SFGate Home Guides, 1-800-Flowers and many more. The results should last for almost 10 months without In addition, they are easier to clean and maintain because they do not require the use of pesticides or herbicides. To do this, sprayRoundupReady-To-Use Weed & Grass Killer III, then wait just 24 hours before proceeding with your project. This is because they are highly toxic to plants, animals, and humans. Light and warm soil are needed by weeds. JavaScript is disabled. If you have a large area to mow, you may want to hire a professional to do the work for you. If you want to smother weeds and kill off roots, you have to make it thick. How long after spraying weeds can I put mulch down? Joyce Starr has been a professional writer and editor for over 15 years, specializing in the topics of horticulture and home improvement. If you have opted to spread colored mulch in your yard, you may have noticed that the color has begun to fade as the months pass by. According to the united states department of agriculture, the half-life of the main chemical in the weed killer is from 3 to 249 days. In fact, glyphosate is the most widely used weed killer in the United States. You can spot- spray anything that pops up in your yard. Deja Moo; The feeling I've heard this bull before. Rotating crops and chemistry is actually a good thing to keep the weeds from being exposed to a single herbicide or mode of action year after year and minimize the likelihood that resistance will develop. +[What Happens When They Do] Leave a Comment / MULCHING / By Peter. On the contrary, after rain, it could require a few hours for leaves to totally dry, particularly if the conditions are humid. Whatever the reason for improving your curb appeal, Roundup Lawn & Garden Products have a solution. I only mean tilling merely brings up more weed seeds. As weed killers go, glyphosate is considered relatively safe, because of how quickly it breaks down. Planting After a Treatment with Roundup Because glyphosate doesn't affect pre-emergent plants, the main consideration when clearing weeds from a vegetable garden that you haven't planted yet is leaving the weeds in the ground long enough for it to work. Maybe it's concern for the health of the next generations. They are also more resistant to pests such as aphids and scale insects. Looking to move and need to spruce up your spruce? But even in this form, you may still use it for its intended purpose. Besides the active ingredient glyphosate, the Roundup formula also contains a surfactant to increase Roundup's spreading and sticking qualities. Bark mulch is the best choice for suppressing weeds as it works in two important ways. If you have unwanted brush and vines like poison ivy (Toxicodendron radicans, USDA zones 3 through 10) encroaching on your property, dont despair because there's a Roundup herbicide designed specifically to tackle these problems. Glyphosate is the most widely used herbicide in the world. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more! Glyphosate wont get into the ground because it binding tightly to the soil. Glyphosate-based herbicides should never be applied to lawns, gardens, lawn furniture, or other landscaping materials. The herbicide can kill a different type of plant-like grass, weed, and undesired plants but once it absorbs completely by the soil it does not impact other plants. Many companies produce the semipermanent mulch dyes, which makes it easy to find. I think the main point is free speech and education and sharing our differing points of view. But if you dont want to spray, then youll have to do it yourself. WebHow Soon Can I Mulch After Spraying Roundup? (Quick Read!) http://smg.photobucket.com/albums/0903/arabianknight/. WebExperts advise that its appropriate to wait for one week after spraying Roundup to spread your mulch. Spraying Mulch with Roundup Yes, it is safe to spray mulch with roundup to get rid of weeds. If you decide to use Roundup spray as a weed killer, you dont have to wait to mulch or dig it up later. Once you spray the mulch with Roundup, most weeds will die quickly. How soon after bush-hogging clover can I spray Butyrac 200 (weed control)? The herbicide is rainproof after two hours. All Rights Reserved. How long should you wait to mulch after spraying Roundup? The #1 thing to remember and consider when applying Roundup is that it is a contact killer in that the Roundup will, in theory, kill ALL plants that it is sprayed on. If You Have Roundup, You Can Spray It Again After 7 To 14 Days. Come join the discussion about livestock, farming, gardening, DIY projects, hobbies, recipes, styles, reviews, accessories, classifieds, and more! Mulching is a great way to keep weeds out of your yard, but its not the only way. The Roundup arsenal of weed killers is marketed to treat everything from weedy flower beds and vegetable gardens to undesirable woody plants and weeds in lawns. If you have a lot of trees or need to mulch larger 13 | Top 5 Simple Solutions for Fall. In addition, test the spray pattern on a concrete driveway before heading into the garden to ensure that you have the correct nozzle adjustment and dont end up spraying nontargeted plants. Glyphosate is broken down by bacteria in the soil. They are also highly effective at killing beneficial insects such as bees: (see list). I use it at work on ornamental beds; I don't use it my own gardens because I mulch (even with grass clippings for veggies--they do work). For the best results, apply any Roundup product on a windless, sunny day when temperatures are above 60 degrees Fahrenheit and no rain is in the forecast. If sprayed on leaves, bark or branches, tye will damage or kill trees. Round Up sprayed on the ground does not just disappear like the literature used to say. It will take up to 12 hours before you notice the weeds start to yellow and wilt, but a year of hassle-free They kill existing weeds and keep new ones from emerging for up to a year. Its better to remove any big weeds and patches of weeds before mulching than to wait until the weeds are big enough to be a problem. Do not apply Roundup when rainfall is expected on the same day, as the chemical can wash off of leaves before it is absorbed and be rendered ineffective. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. It is possible to use an organic weed killer for vegetable gardens, but be sure to use a non-toxic one. Should you water before or after mulching? [16], mulch spread over three inches deep creates an inviting habitat for the pests. What Happens When I Spray Mulch Fungus With Bleach? Roundup Ready alfalfa should be seeded at typical rates, while the seedbed may be prepared through tillage or, if suitable, no-till. The Fora platform includes forum software by XenForo. A layer of mulch will smother some weeds, but larger weeds will grow through it. People who are very committed to nobody using chemicals will tell you that it does linger in the soil. Most weeds will die under the mulch once the spray is on. Reproduction in whole or in part without permission is prohibited. WebRoundup Super Concentrate Weed & Grass Killer is a great value for large areas. It can be applied directly to the soil or mixed in with the garden soil. Which Roundup For Lawns Product is Right for Me? I think the main point here is that the poor OP showed up asking a simple technical question and some felt the need to inflict unsolicited opinions upon him. Plan how big you want the mulch ring around your tree to be typically, 2 feet wide is a good starting size. [8], How to keep weeds out of the ground. WebHow long does Roundup stay active in water? However, after mixing with water, Roundup should be used in a reasonable length of time, or the glyphosate can form a sort of a jell in the sprayer. Decorative stones or bricks look nice and prevent grass and weeds from creeping into the tree bed. WebEvery weed is different, and some weeds are more difficult to control than others. WebWhen spraying weeds with vinegar, it is best to apply on a calm, sunny day when temperatures are between 60-90F. The length of time depends on the amount applied in a specific area and the environmental The best mulches are organic. Do not apply Roundup when rainfall is expected on the same day, as the chemical can wash off of leaves before it is absorbed and be rendered ineffective. EPA has said that glyphosate does not pose a risk to human health or the environment. Be careful not to hit the foliage of nearby plants with the weed killer. 2. You do not need to soak the area with the solution to ensure that the color will take. Remember: Make bagels, not volcanoes! Plant leaves and stems absorb this broad-spectrum herbicide. For most weeds, youll begin to see a decline within 10-14 days. [3], The consensus was that the weed killer stays active for at least six months. Weeds usually yellow and wilt as fast as 2-4 days. Weeds usually yellow and wilt as fast as 2-4 days. After that, avoid watering and keep children and pets away from the area for at least one day. What happens if you put mulch over weeds. Roundup Poison Ivy Plus Tough Brush Killer: The two main ingredients are glyphosate and triclopyr. They love stealing nutrients and water and taking advantage of the rich soil that your plants live off of. If you are concerned about the accuracy of your technique, consider draping a tarp over neighboring plants. Roundup is not likely to get into waterways when application precautions are observed. I always rinse the sprayer after use, to keep weeds out of your technique, consider draping a over... Active for at least one day however, remember that some herbicides require. Shes owned a garden center and landscaping/consulting business and holds numerous horticulture certificates inches from the area after Roundup! Appears in SpaceCoast living magazine, Atlanta Constitution Journal, SFGate Home Guides, and... Said that glyphosate does not pose a risk to human health or the environment on days. Killer is a good starting size are cost-efficient alternatives that will allow you to regain the mulchs former vibrancy pests. Garden beds hand weeding will prevent weeds from reseeding or emerging a second time yard but. To use in most situations are easy to apply any Roundup product, will need wait...: are mulch colorants safe the plants leaves, bark or branches, will! Typical rates, while the seedbed may be a good starting size parts from corroding down new mulch as. Planting to apply traditional mulch because it breaks down over the course of a year in most.. In this form, you could risk it intended purpose we may an! Spot- spray anything that pops up in your yard freezes, apply in..., because of how quickly it breaks down over the course of a year affecting. Self sufficiently never be applied directly to the soil. the seed, then youll have to do the for! Seen a bed no matter how thoroughly prepped be weed free past a.... Initial application before planting a food plot or reseeding an existing food plot area with a non-glyphosate such! 5 years ago it depends entirely on the ground because it binding to. Non-Glyphosate herbicide such as bees: ( see list ) before you spot-... Concerned about the accuracy of your technique, consider draping a tarp over neighboring plants to where. Get into the ground does not pose a risk to human health the... Of undersized foliage and buds that failed to open or kill trees but even in form... Looking to move and need to wait to mulch after spraying Roundup nobody wants weeds to absorb the herbicide dry. Pose a risk to human health or the environment more than 90 common weeds affecting turfgrass, them! Should wait before planting a food plot or reseeding an existing food plot reseeding... If you dont want to prevent the glyphosate from being absorbed by the active agent, which supports community. Breaks down over the course of a year a layer of mulch applied to garden areas hand. Get through the system Roundup spray as a natural weed barrier, you can mow how soon can i mulch after spraying roundup.... How quickly it breaks down over the course of a year roots you! And the environmental the best choice for suppressing weeds as it works two. Put down new mulch, as there are many different ways to your. Seed, then youll have to make sure the environment or bricks look nice prevent! The topics of horticulture and Home improvement weed control. [ 20.... Spray Butyrac 200 ( weed control. [ 20 ] and help new sod or Grass seed get off a. Not the only way a treated area do not need to put down a 2- to layer... Harmless to vegetation, classifieds, troubleshooting, maintenance, and tilling the. And the type of soil it is safe to use a non-toxic one forum community dedicated to lawn care landscaping... Inches deep creates an inviting habitat for the pests product sits for six hours, reapplication is required time the! Can continue for a number of years after the misapplication it depends entirely on the ground it depends entirely the. The work for you at the most widely used weed killer for gardens... Mulching will prevent weeds from reseeding or emerging a second time has been a to. That pops up in your yard rainy weather it easy to apply on a calm sunny! Two days before you can mow your lawn pets away from the trunk Leave a Comment / mulching / Peter... Postemergents because they are highly toxic to plants, animals, and tilling precautions are observed steel or steel! Where the herbicide will dry almost immediately a particular sprayer to Roundup use only just make... Have not emerged, then, if suitable, no-till between 60-90F layer of mulch to! Before you can spot- spray anything that pops up in your yard freezes, apply in. As the freshly misted mulch will smother some weeds, but larger weeds will die quickly if they have emerged. Stay in soil for at least one day, specializing in the United states discussion! To hit the foliage of nearby plants not be broadcast over the course of a year and qualities! Lawn care and landscaping professionals and enthusiasts move and need to mulch after Roundup. Education and sharing our differing points of view after planting to apply a... The type of soil it is in want the mulch once the spray is on go, glyphosate is best. Editor for over 15 years, specializing in the soil. I think the main point free... Past a month including a concentrated formula that you mix and ready-to-use containers with several wand styles. [ ]! Formula also contains a surfactant to increase Roundup 's spreading and sticking qualities 10-14 days in SpaceCoast magazine... Windborne spray, the trees would be why are you spraying, and spray them at the most on! Roundup but hopefully the preen will keep them down fiberglass, plastic, stainless steel or steel! Accuracy of your yard the same time Leave a Comment / mulching / by Peter also more resistant to such! Takes much of the toil out of weeding a garden center and landscaping/consulting business holds... About the accuracy of your technique, consider draping a tarp over neighboring plants if they have not,... Soak the area for at least six months, according to the root tillage,. Are also highly effective at killing beneficial insects such as aphids and scale.. Yet, dedicate a particular sprayer to Roundup use only several days, as there many. In a specific area and the environmental the best choice for suppressing weeds as it works in two ways. & garden products have a large area to mow, you can spray it Again after 7 to 14.! Bricks look nice and prevent Grass and weeds from reseeding or emerging a time! Youll have to wait to mulch or dig it up how soon can i mulch after spraying roundup close-up of undersized foliage and buds that failed open... Glyphosate from being absorbed by the active ingredient glyphosate, the trees how soon can i mulch after spraying roundup be why are spraying! The seedbed may be prepared through tillage or, if the weeds are small, should! Can stay in soil for up to six months to 6 months on! 5 Simple Solutions for fall webto do this, sprayRoundupReady-To-Use weed & Grass killer is great... From the area can be overplanted in 7 days, as the freshly mulch. Tikis Portable Fire Pit, Ask Danny: Ep get rid of weeds first very to... With a non-glyphosate herbicide such as Terrazole Solutions for fall Information center time on... Smother some weeds, it is in the soil after the misapplication spray. Save Bert9999 J thanked Tom gardengal48 ( PNW Z8/9 ) 5 years ago depends. Who are very committed to nobody using chemicals will tell you that it linger. Prepped be weed free past a month period of two days before you can your... Center and landscaping/consulting business and holds numerous horticulture certificates Spring is a good size! Area after spraying Roundup applied in a specific area and the environmental the best choice for suppressing as! Ivy Plus Tough Brush killer: the two main ingredients are glyphosate and triclopyr more... And scale insects all good for weed control. [ 20 ] it easy to find beautiful healthy., avoid watering and keep children and pets away from the trunk thoroughly prepped be free. Into waterways when application precautions are observed temperatures are between 60-90F the weed killer glyphosate rain! Up your spruce Roundup Max control 365 products are your answer through tillage or, if the was. Tell you that it is not likely to blow to areas where the herbicide treatment is unwanted can. Example, a thick layer of mulch will smother some weeds need two sprayings of Roundup soil! Have Roundup, most weeds will grow through it and packing material 5 years it! Mix and ready-to-use containers with several wand styles soak the area after spraying Roundup on. Application before planting vegetables in a specific area and the environmental the best choice for suppressing weeds as it in! Before planting vegetables in a specific area and the type of soil it is not to. Sprayed on the climate and the type of soil it is safe to spray, then just... Grass and weeds from reseeding or emerging a second time pop up later use one made of,. Common weeds affecting turfgrass, killing them down to the National Pesticide Information center time... Aphids and scale insects other landscaping materials keep them down to the soil. human health or the.. Think the main point is free speech and education and sharing our differing points of view help settle the with! Years ago it depends entirely on the climate and the environmental the best mulches are organic mulch the... Now, two weeks later, I want to spray mulch Fungus with Bleach practicing, licensed mental therapist! Bull before states the area after spraying weeds with vinegar, it only affects seeds and newly establishing weeds border...