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How to Get Rid of Barnyardgrass

Barnyardgrass is a particularly difficult summer weed to control because it has multiple germinations or cohorts. A fast grower that is known to spread over lawns and gardens quickly, barnyardgrass has given lawn owners and many of our customers fits when it comes to controlling the weed when it gets out of hand.

The experts here at Solutions Pest and Lawn have done the research and trials to find the best method and herbicide application for this hard to manage weed and here we will share with you what we have learned so you can eradicate this pesky invader from your lawn.

To get rid of barnyardgrassyou first need to know the background information on the weed and do a little bit of homework to see what conditions this type of weed likes, what it doesn’t like and then based on the information, approach with a control program. This is where we can best help.

Here at Solutions Pest and Lawn, we’re dedicated to serving you with not only supplying the best professional-grade products in the lawn and pest control industry, but also we want to empower you with the confidence to tackle any issues you have on your yard or home yourself, without hiring a professional.

Our motto is, “Ask us, then do it yourself”. Aside from our customer service line where you can talk live to an expert, you can also email us your specific questions and concerns at askapro@solutionsstores.com and we’ll be happy to help guide you in the right direction.

How To Get Rid of Barnyard Grass: Solutions 4 Step Process

Step One: Identification It's important to identify the type of weed you have to make sure that it is actually barnyardgrass and not some other similar looking invasive weed. Correctly identifying the weed you are encountering on your lawn will help you in aquiring more information about the weed such as what the weeds tendencies and characteristics are and also which one of our products can best treat that particular weed.

This is important because some more stubborn weeds have a high tolerance or resistence to particular herbicides and control methods and are specifically labeled for certain weeds and not for others. If you misdiagnose the weed on your lawn as barnyardgrass when it isn't, you may purchase a herbicide not meant to tackle it and it will lead to disappointing results and overall, a waste of money.

Barnyardgrass grows in large stalks and when it first starts to appear it has a spreading coverage. The stem is flattened close to the ground and roundish in upper parts of the plant. This coarse stem can reach up to five feet in height. Another trait is the redness found at the crown. This is a grass that has neither ligumes or auricles. When it has matured and gone to seed, you will find the most obvious ways to identify this grass because of its unique panicle. The plant produces multi-branched, densely packed seed heads (or panicles) composed of knot-like flowers or spikelets which are covered with stiff hairs. Barnyard grass has flat elongated, linear leaves. They are smooth, dark green or purple colored.


If you are unsure of what weed you have, you can contact us at identification@solutionsstores.com and send us a photo of your weed and we will identify it for you and suggest treatment options.


Step Two: Inspection. Once the plant has been properly Identified, you can then move to the inspection process. Barnyardgrass blooms from June to October. This is an annual weed that is killed by the frost of winter and grows quite aggressively compared to other grasses where it has established. Some species of barnyard grass are aquatic and thick stands of these can be found growing in margins of lakes and marshes and along roadsides.  When inspecting, watch out for an erect or slightly sagging stalk growing at the tops of the plants. Aside from checking the severity of its presence, also check what maturity level the barnyardgrass is at because if they are more mature, you're looking at a more difficult time removing the plant.

Step Three: Control. Barnyardgrass can be a headache to handpull and frankly doing so is a waste up time because if it has already gone to seed, it will just grow back if you yank it out from the ground. The best option for control is utilizing chemical herbicides.

A pre-emergent at the right time will protect against barnyardgrass. We recommend using Prodiamine 65 WDG (Barricade Herbicide) or Quinclorac 75 DF Herbicide (CRABGRASS KILLER). Again, timing is key or the product will not successfully keep the barnyardgrass from growing. Lay this out in the spring before you see any of the barnyardgrass.

If barnyardgrass is already growing on your lawn you can use Glyphosate or Roundup and spot treat your lawn. Before long the barnyard grass will die out. You may need to do repeat applications after 7 to 10 days if the weed is particularly persistent and problematic. Barnyardgrass is known to develop a resistent so you can contact our experts to see which alternatives you can use if a product ended up not working or is giving disappointing results.


Step Four: Prevention. After you have eliminated ragweed from your property, you need to implement culture practices and lay out pre-emergent to prevent their return.If you keep your lawn healthy with proper mowing and fertilization, there will be very little room for this stubborn grass to grow. Continue laying out pre-emergent during the spring and fall to keep barnyardgrass from making a comeback.


Have Some Grassy Weeds You Want Gone? View Our Grassy Weed Control Section


Learn more About Barnyardgrass

Barnyardgrass (Echinochloa crus-gallia) enjoys the condition of moist soils and grows in both cultivated and uncultivated areas. It is often found in rice, corn, orchard, vegetable and other agricultural crops. It can also be found in moist turf areas and marshes.

This grass spreads by seed and grows in clusters where it roots and branches at the lower joints. Mature plants can reach heights up to 5 feet. Stems are smooth and stalky and flat near the base of the plant. Leaves are smooth but may be rough closer to the tip.

This summer annual weed is easy to identify by its unique seedhead, which is usually purple with a bristle at the end which can vary from 2 to 8 inches in length. Seeds develop on side branches. Barnyardgrass weeds bloom from June through October, seeds are flat on one side and round on the other.

This weed may produce more than 2,400 pounds of seeds per acre. The wind, water, animals, and humans may spread the seed to other areas. Barnyardgrass is a vigorous grower and quickly removes vital nutrients such as potassium, nitrogen and phosphorus from the soil so if it grows onto your lawn, you have to act fast to control it before it zaps the lawn of all of it’s nutrition.

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Recommended Pre-emergent and  Post-emergent Herbicides:

Barnyardgrass weeds can be annoying when they appear in lawns or garden areas. Control of barnyardgrass in turf should involve a combination of both chemical and cultural practices. If you keep your lawn healthy with proper mowing and fertilization, there will be very little room for the pesky grass to grow.

Barnyardgrass can show resistance to common herbicides. Based on trials that we have done the above herbicides are the most successful in treating barnyardgrass. Repeated application may be necessary so don’t assume that things will be “one and done”.

Timing and persistence is important when it comes to treating hard to manage weeds such as barnyardgrass.

For best control, make sure to treat barnyardgrass early and often. Well-timed early season applications, using multiple pre-and postemergence herbicides with different modes of action, provide the most consistent weed control and will do the most to discourage the weed from developing a resistance.

Better Safe Than Sorry: Equip Yourself With Protective Safety Equipment Before Spraying



  • Want to achieve the best possible results in your herbicide treatment application? Use a surfactant  and mix it with your selected herbicide to combat surface tension and runoff when spraying your targeted barnyardgrass weeds.

  • Excessive spraying could burn your grass. Make sure to not overspray by using a spray pattern indicator so you can mark where you have sprayed.

  • Herbicide chemicals have the potential to harm or irritate skin on contact. When handling any weed killing chemicals be sure to wear the right protective equipment to cover your skin, eyes, nasal openings and mouth.

  • Are you a more visual learner? We have informative How-To Videos which show you step-by-step what to do and how to properly apply herbicide to a variety of weeds.

Make Sure You Have The Right Equipment For The Job. SHOP For Sprayers and Other Lawn Care Essentials


For more information on controlling barnyardgrass on your lawn and to get advice catered to your unique issue from experts, contact us at askapro@solutionsstores.com or call our customer service line at (800) 479-6583.

Additional Resources On Barnyardgrass

Weed Gallery: Barnyardgrass-UC IPM


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