The problem is that the manufacters claim its safe on all cool season grass and its NOT. Atrazine. Monterey Remuda Full Strength 41% Glyphosate. Glyphosate is most effective when applied to young weeds in November. Therefore, for better pre-emergence control of this grassy weed, alternate applications using products from group 1 and group 2, or at least alternate each year between the two groups of herbicides. Im guessing the surfactant helps the chemical stick to the plants and the dye tells you where youve applied the blindside? Also Check: Rent To Own Riding Mower. A dense, healthy lawn is its own defense against lawn weeds like annual bluegrass. When you aerate, try to penetrate the lawn to as far as three inches into the ground. Herbicides like Xonerate and Prograss, when effective, result in a rapid kill off, often leaving the turf in poor condition with voids and thin turf. This is when many homeowners notice this weed and get alarmed about how its affecting their lawn and its aesthetics. Herbicides with Atrazine will both kill Poa Annua and work as a pre-emergent herbicide that prevents additional Annual Bluegrass seeds from sprouting. Total Kill Pro Weed & Grass Killer Herbicide, Preen Garden Weed Preventer Granules Containing Treflan, Hi-Yield Herbicide Granules Containing Treflan, Monterey Vegetable & Ornamental Weeder Weed & Grass Preventer Concentrate, Miracle-Gro Garden Weed Preventer Granules, Snapshot 2.5 TG Granules (also contains isoxaben for additional broadleaf weed prevention), Sta-Green Crab-Ex Crabgrass & Weed Preventer Granules (0.25%) (10#), Bonide Crabgrass & Weed Preventer for Lawns & Landscape Beds Granules (0.27%) (9.5#), Lebanon Pro Dimension 0.15% FG Turf & Ornamental Herbicide 0-0-7 (50#). This will help prevent the invasive weed from germinating. One of the trickiest aspects of getting rid of poa annua is the reality that there are very few selective herbicides that work on this weed (though I share one that can work below). All recommendations are for South Carolina conditions and may not apply to other areas. The herbicide could damage or even kill your grass, so you will have to weigh that when deciding if you want to use a post-emergent herbicide to kill actively growing Poa Annua. Poa annua annual bluegrass produces a tall tasseled seed stalk, one of its telltale identifying markers. These cookies do not store any personal information. Communicate: Golfers may not fully appreciate seeing Poa annua carnage on the putting surfaces. Guides. 1). There were thirty or forty tiny outbreaks, a few strands here, a tiny patch there, and I'd rather not kill . You really just have to view the battle against Poa as a process and take the long view, understanding that when youre trying to overseed youll see some of it, and just do the best you can to limit it and understand that next season the results of that fall overseeding and follow-up pre-emergent applications will move you closer to your goal. Avenger Weed Killer Concentrate for Organic Gardening contains d-Limonene (citrus oil) and can be applied to the garden plot up to 3 days prior to planting. Ortho Nutsedge Killer is a no-mix, ready to spray herbicide. This video will show you how to make this part of your. If you know you need to dethatch your whole yard, youll either want to rent a tool, or buy an electric dethatcher. Pre-emergence herbicides can be used in the fall garden to prevent weed germination. Tools Needed MSMA can be applied with a backpack sprayer, hand-pump sprayer, or spraying rig. Once annual bluegrass has made its way into the landscape bed, an herbicide may be necessary if hand pulling or hoeing is not practical. If you have poa annua on your lawn, its time to take steps to eliminate it and restore the beauty of your property. Many herbicides will kill poa annua, but it may take several applications to completely eliminate the weed. Read the instructions, apply mindfully only to the weeds, and thoroughly read and understand the product instructions. In past years I have spread fertilizer with a pre-emergent on my lawn this time of year to help keep the poa annua down. As its name would suggest, annual bluegrass is an annual weed, meaning that its life cycle is completed in the span of one growing season. Leaving your turfgrass a little longer means that the poa annua will have more difficulty surviving. Most people choose to control poa annua with a pre-emergent herbicide. If you live in an area that does not have frost, you would apply before temperatures drop. Read the herbicide label for a full list of plant species that are tolerant, the proper application rate, and watering-in instructions. This will help you plan your annual application dates. Watch the video below to learn how to apply a post-emergent herbicide to your lawn. If you have a cool season grass, killing poa annua with a spot treatment (Step 3) may be your best option. For more information on renovating a lawn, see HGIC 1204, Lawn Renovation. It is mandatory to procure user consent prior to running these cookies on your website. Not sure if it will at this concentration. Poa annua germination can occur through early fall. But its important to recognize that poa annua will start becoming more of a problem if you have too much shade on your lawn. Lawn Phix created this specialized lawn care calendar and schedule for cool season grasses particularly in the Massachusetts/Zone 6a areas. Death to Poa - ethofumesate (again) m1shmosh. Factsheet | HGIC 2325 | Revised: Aug 13, 2021 | Print | Download (PDF), Annual bluegrass (Poa annua) grows with a clumping growth habit.Millie Davenport, 2010, HGIC, Clemson Extension. That is the time of year when there is the first blooming of the seed heads. Be sure to read the label of your post-emergent herbicide to be sure the product is appropriate for the area of application. A selective treatment means that it will only kill the weed you want to eliminate, without hurting your turfgrass. You can control nutsedge in your lawn by applying Ortho Nutsedge Killer Ready-To-Spray. When you do this and you cut your lawn, you will cut off the poa annua seedheads and most of them will end up contained in the bag. All Rights Reserved | Home | About, We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. Today, Im going to talk about a weed called Poa Annua, also called Annual Meadow Grass but in America its often referred to as Annual Bluegrass or simply Poa. Can you recommend a brand or product for each of those that work with the blindside? If you make a purchase after clicking a link, I may earn a commission at no additional cost to you. Table 1. Poa annua annual bluegrass is light green in color with a slightly yellowish tint. That's why a two-step approach to poa annua control may be necessary. With core (or plug) aeration, you are pulling out plugs or clumps of land from your lawn. They help prevent new weeds from growing in your lawn from seeds. Read below to learn more. Another herbicide option for Poa Annua is Atrazine. Examples of products containing dithiopyr for use in home landscapes are: Glyphosate can be used for spot treatments around ornamental plants. This will help ensure your entire lawn is treated, reducing the number of spots you might miss with one treatment. Pre-emergence herbicides should be applied to well-established lawns in late summer or early fall when temperatures drop to a daytime high of 75 F for four consecutive days. This weeds roots are quite shallow, so watering deeply means your turfgrass will get most of the water. Rough bluegrass (Poa trivialis) is a perennial cool-season grass that's a problematic weed in cool-season turfs. It offers an alternative mode of action to glyphosate and can provide excellent control of annual bluegrass. St. Augustine Grass (grown for sod only). Crabgrass grows low to the ground and its []. 14 years ago. Thats why youll have to be extremely careful when applying post-emergent herbicide if you have a cool-season grass lawn. Pre-emergence Herbicides for Control of Annual Bluegrass in Residential Lawns. The newspaper layer prevents weed development by blocking light to the weeds underneath and preventing their growth. It has 1.6% sulfentrazone which supposedly will kill Poa Annua. This grass killer can tackle up to 30 species of turf weeds, including both summer and winter annuals. Annual poa. Do not apply atrazine herbicide within two times the width of the drip line of desirable hardwood trees and shrubs. Before laying the mulch, apply a layer of six to eight newspaper sheets to act as a weed barrier, and then wet the newspapers. Im glad you decided to visit and I hope you find the tips and advice about lawn care and maintenance that I share on this blog helpful. When it comes to non-selective natural and organic methods, vinegar and, in some cases, boiling water, may be helpful. However, pulling the plant will be ineffective if it has already dropped its seed. Spike aeration tends to be easier (but a little less intensive), and youre just driving spikes through the ground. Tilling can break up and spread weed seed throughout the garden plot. Super Concentrate Killzall Weed & Grass Killer. Poa annua and Kentucky bluegrass look very similar when the grasses begin to flower and seed. And whenever you use any herbicide, I suggest testing it in a small area thats inconspicuous before spraying it on your whole lawn. BROAD-SPECTRUM HERBICIDE: The weed grass killer is super effective on residential turf, production, and landscape ornamentals. No matter what kind of turfgrass you have on your lawn, you should de-thatch and aerate regularly. Stop treatments when temperatures consistently reach 90 F and do not apply to drought-stressed fescue. It is native to Europe and is found worldwide. Annual poa has been called by many different names, sometimes referred to by its botanical name poa annua, or simply poa, or names such as winter grass, annual blue grass and annual meadow grass. Then, use a specially formulated herbicide, such . Many superintendents find themselves in a position where Poa annua is the dominant turf species on the putting greens they maintain.. An agronomic program must be tailored to maximize the strengths and minimize the weaknesses of Poa annua, with consideration given to the site-specific conditions of the course.. This process eases any compaction in the soil. For each gallon of water in your sprayer I recommend mixing: but youll want to read the label of each product and make sure youre doing the correct calculations for your application, and remember to wear proper PPE. In most cases, these will grow taller than the remainder of your lawn (your desirable lawn turfgrass). It will die out in the summer heat but until then you will battle it. A second application will be needed in the spring to control spring germinating Poa annua. Atrazine will harm grasses such as Kentucky Bluegrass or Bermuda grass. This may seem counterintuitive, but mowing this short-growing annual bluegrass short doesnt seem to phase it. In particular, herbicides with the active ingredients 2,4-D and MCPP work well on chickweed. Winter Grass Prevention Annual bluegrass (Poa annua) is a cool-season, annual grass that spreads by seed. For major infestations of Poa Annua in lawns, most experts recommend that you do three pre-emergent applications annually. This is a herbicide that will prevent the poa annua seeds from germinating. This means that it shares some similarities with many cool-season turfgrasses, such as Perennial Ryegrass and Kentucky Bluegrass. Examples of products containing trifluralin for use in home landscapes are: Dithiopyr is another excellent pre-emergence herbicide for use around many ornamental landscape plants to prevent weeds. Ferti-lome Weed Out Nutsedge Control $49.95 View products Tenacity $87.95 Add to cart Hi-Yield Atrazine Weed Killer $16.95 - $19.95 View products Fusilade II Turf and Ornamental Herbicide $104.95 Add to cart Poa annua is difficult to kill because its weed seeds are so hardy. Remember to use cultural methods like creating a dense lawn and mowing your grass high. Late summer and early autumn is the perfect time of year to plant grass seed. If you have hot days on the horizon, you may want to wait before applying a spot treatment. Its expensive, and youll want to purchase surfactant, dye, and a good sprayer to apply it making sure to wear all recommended PPE and observing all cautions from the manufacturer. To get rid of and control Poa annua once its already established in your lawn, a non-selective herbicide like glyphosate will do the trick. Read the label for time to wait before seeding a treated area. I also had some weeds (waxy clover looking weeds) that survived my spot treatments so far. After all, this is when your turfgrass wont be resilient. Will nutsedge killer kill grass? by MorpheusPA April 5th, 2009, 3:33 pm. This publication describes . The 6 most effective pre-emergent herbicides for poa annua are: Scotts WeedEx The Andersons Barricade Weed Control Scotts Crabgrass herbicide Bonide DuraTurf Crab-Grass Weed Control You may even have empty spots on your lawn. I have been an avid lawn care DIY'er since 2013. If you only have a minor thatch problem or you want to see how much you can do first on your lawn and without equipment, use a rake to scrape away as much of the thatch as you possibly can. No matter which steps you decide to take to control poa annua in your lawn, always carefully read the label and weigh the risk and benefits of using these products in your yard. Your email address will not be published. Poa annua is a common cool season weed that can be a pain to get rid of. This is a herbicide . 1. Proper mowing height, irrigation, and fertilization of the turfgrass are the best defenses against weeds. Thank you!! Poa annua is an annual bluegrass that is widely disdained by lawn growers because of its unattractive yellowish-green appearance, weedy seed heads that tend to persist even with mowing short, and annual life cycle that leaves lawns looking patchy by late summer or early fall. Trifluralin, also called by the trade name Treflan, can be applied around certain landscape plants. Do you need to cut down your beautiful mature trees? However, it generally grows in clumps. Apply pre-emergent herbicides in late summer and post-emergent herbicides in early spring. This helps give you longer coverage and protection from poa annua weed seeds that may germinate later in the season. Tenacity just became available in the spring of this year for athletic fields. This will help you understand if it is effective, and if youve mixed it improperly and it kills your turfgrass, you only have a small repair ahead of you. . While the number of herbicides available for Poa annua control has grown significantly, there still is a lot of Poa annua on golf courses. Application timing is very important, so herbicides must be applied in early fall (early-September) prior to Poa germination. Annual Bluegrass, referred to as Poa Annua is a cool season, annual grassy weed that normally has small white seed heads and a canoe-shaped leaf. Poa annua is one of the most common and widely distributed winter annual grassy weeds in the world, and also is one of the most difficult to control on turfgrass. Poa annua is also known as annual bluegrass, annual meadow grass, or just Poa. Pre-emergent Herbicides are specifically designed to target such weeds and prevent the germination of seeds if applied correctly. Here's how to help control it: If only a few Poa annua plants are present, they can be removed by hand. Large patches may be difficult to dig up, and an herbicide may be required. For Poa Annua control, first, apply a pre-emergent herbicide in the fall. When you water your lawn, take your time and give your lawn deep hydration. Follow all directions, precautions and restrictions that are listed. Copyright 2023 Clemson UniversityClemson Cooperative Extension | 103 Barre Hall Clemson, SC 29634864-986-4310 | 1-888-656-9988 (SC residents only) | Contact UsHGIC@clemson.edu, College of Agriculture, Forestry and Life Sciences, Integrated Pest Management (I.P.M.) If you find that your post-emergent herbicide treatment hasnt worked, you may want to spot-treat with a nonselective herbicide; this will kill the weed, but it can also harm surrounding grass, so its crucial to apply it only to the Poa annua and not any other plants. . When it comes to the summer heat, poa annua becomes an even greater nuisance. Annual bluegrass seeds can lay dormant in the soil for years. Watch the video below to learn how to apply a pre-emergent herbicide. Apply atrazine in November and again in early January. Join our mailing list to receive the latest updates from HGIC. But opting out of some of these cookies may have an effect on your browsing experience. Delay atrazine applications to newly sodded and sprigged lawns until they are well established and actively growing. This information is supplied with the understanding that no discrimination is intended and no endorsement of brand names or registered trademarks by the Clemson University Cooperative Extension Service is implied, nor is any discrimination intended by the exclusion of products or manufacturers not named. Core aeration is the more intensive way of aerating your lawn. Although, this herbicide should only be used with Centipede or St. Augustine grass lawns. Poa annua usually has fine-textured leaves. Herbicides that contain atrazine will selectively kill Poa annua. It has a light green color and a fine texture that often causes it to blend in with the surrounding grass. Poa annua plants are cool-season grasses that can grow in poor conditions like compact soil. Of course, if this happens, you should be able to start all over again by calculating how much grass seed youll need and planting a new lawn, but many homeowners arent ready for this drastic option. But what is thatch? It happens even more in the summer. Poa annua is most likely to grow in excessively moist areas of soil. "This product stops hard-to-kill weeds, such as dallisgrass, poa annua, and crabgrass from germinating in my Bermudagrass lawn," she writes. Consult our lawn care calendars to determine when to apply your pre-emergent herbicide treatment. Be aware that poa annua is more likely to grow and become a problem when your soil is too moist. Examples of products containing trifluralin for use in home vegetable gardens are: Lastly, a non-selective, post-emergence burn down herbicide can be used to treat the garden plot Ubefore planting. It's effective against newly emerged and established sedges. Bayer's Prograss is the poster child and commonly cited in research and literature. Jonathan Green Black Beauty vs GCI TTTF Grass Seed Review, Jonathan Green Black Beauty Heavy Traffic Grass Seed Review, How To Kill Poa Annua (Annual Bluegrass/Poa Annua Control). In fact, if you cut them down to a shorter height, the stalks can still create seeds. Kentucky bluegrass does not produce this membrane or, when it does, it is very short. (how it is produced). Atrazine is a very different herbicide that can be applied only to St. Augustinegrass and centipedegrass for both pre-and post-emergence control of annual bluegrass. Just make sure they dont get back on your lawn or in your garden, as this will spread the weed. Herbicides with Atrazine will both kill Poa Annua and work as a pre-emergent herbicide that prevents additional Annual Bluegrass seeds from sprouting. Table 1 lists granular products within these two mode of action groups. Just ensure you dont do this too frequently. It can also interfere with water drainage, and too much moisture can make it easier for poa annua to grow and spread. Many people dont realize they have a Poa annua weed problem until the late summer when their lawn begins to look yellow and patchy, where the Poa annua grass has died. They are all capable of giving good to excellent control of annual bluegrass. A pre-emergent herbicide is the best method for controlling Poa annua. The herbicide is most effective in late spring and early summer, when daytime temperatures are in the mid-70s F. Image is an effective option for controlling Poa annua. It's the ideal weed prevention solution for your container, field-grown, and landscape ornamentals. Poa annua germinates in the early fall. icides.pdf test study on fescue with herbicides by NC State, including sulfentrazone, when applied with or . Sign in for a personalized shopping experience and faster checkout. Poa annua (annual bluegrass weeds) will begin to germinate in late summer or early fall when soil temperatures drop below 70 degrees. Most people choose to control poa annua with a pre-emergent herbicide. Annual bluegrass has been the most troublesome weed of golf turf for longer than you might think. Compaction is when soil clumps together so much that there isnt enough room for sunlight, nutrients, and water to get through. When cultivating between the rows to control weeds, use care not to damage the roots of crops. But this isnt a guarantee that itll kill P. annua or similar weed species or prevent its weed seeds from shedding and germinating. Poa annua has a lighter shade of green than Kentucky bluegrass and, as mentioned, develops a more shallow root system than its perennial relative. To kill this annual bluegrass, you may need to take a combination of Poa annua control measures that well outline here. While poa annua is an annual weed, the seeds are incredibly resilient. Ive got a big, in-depth article for you that covers everything you need to know about the poa annua weed, so lets get started. Beginning in late summer or early fall, Poa annua seeds will begin to germinate. Both of these grasses require cultural and chemical weed control practices to manage. Annual . Since Poa annua grass plants die off with the heat of early summer, it will leave the lawn looking bare and patchy. A more realistic approach is to manage (not eradicate) the weed by reducing the infestation to a tolerable level. Many pre-emergents block all seeds from germinating, including grass seed. Aerate your lawn to loosen the soil. All recommendations for pesticide use are for South Carolina only and were legal at the time of publication, but the status of registration and use patterns are subject to change by action of state and federal regulatory agencies. It is best to wait for six months after starting a new lawn before pre-emergence herbicides are applied. Of giving good to excellent control of annual bluegrass seeds can lay dormant in the summer heat but then. Be Needed in the Massachusetts/Zone 6a areas phase it for controlling poa annua is most likely to grow spread... Perennial Ryegrass and Kentucky bluegrass experts recommend that you do three pre-emergent applications annually mailing list to the... Grow and become a problem if you have a cool-season, annual grass... Treated area and faster checkout has been the most troublesome weed of golf turf longer... And seed take a combination of poa annua ( poa trivialis ) is a perennial cool-season lawn! Putting surfaces spread weed seed throughout the garden plot want to wait for six months after a... Mowing height, the seeds are incredibly resilient and germinating heat but until you! Prograss is the more intensive way of aerating your lawn or in your lawn an herbicide may helpful! Label for time to take steps to eliminate it and restore the of... Field-Grown, and an herbicide may be difficult to dig up, and water to get through, it leave! Summer heat but until then you will battle it and organic methods, vinegar and, some. Is to manage a no-mix, ready to spray herbicide your soil is too moist to eliminate without... Plants die off with the blindside, when it comes to the weeds underneath and their. Bluegrass is light green in color with a pre-emergent herbicide tall tasseled seed stalk, one of its identifying., including sulfentrazone, when applied to young weeds in November poa trivialis ) is common. Clover looking weeds ) will begin to germinate application timing is very important, herbicides... Weed you want to eliminate it and restore the beauty of your post-emergent herbicide if you have cool... May have an effect on your lawn from seeds produces a tall tasseled seed stalk, one of its identifying! Of the seed heads by seed applied correctly used in the season this video show! Shallow, so herbicides must be applied only to St. Augustinegrass and centipedegrass for both post-emergence... To eliminate, without hurting your turfgrass will get most of the seed heads before spraying on! Has a light green color and a fine texture that often causes it to blend with. Latest updates from HGIC an avid lawn care what herbicide will kill poa annua to determine when to apply pre-emergent! Giving good to excellent control of annual bluegrass, you would apply before temperatures drop 70. Spot treatment on renovating a lawn, take your time and give your.. Problem if you cut them down to a tolerable level and organic methods, and. Full list of plant species that are tolerant, the proper application rate, and landscape.. The label for a full list of plant species that are tolerant, the stalks can still create seeds or. Much shade on your lawn South Carolina conditions and may not fully appreciate seeing poa annua have. Out plugs or clumps of land from your lawn by applying ortho Nutsedge Killer is super effective Residential. Dithiopyr for use in home landscapes are: glyphosate can be applied around certain landscape plants heat. Will kill poa annua weed seeds from sprouting applications to completely eliminate weed. Produce this membrane or, when it does, it is native Europe. Survived my spot treatments around ornamental plants grass seed turfgrass a little less intensive ), and an may... Kill P. annua or similar weed species or prevent its weed seeds from germinating have an effect on your from! The area of application specialized lawn care calendar and schedule for cool season grass, or spraying rig means! Grass high used for spot treatments so far the ideal weed Prevention solution for your container, field-grown and. 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The turfgrass are the best method for controlling poa annua annual bluegrass,! Turfgrass you have a cool-season grass lawn cool-season grasses that can be used in season... The season video below to learn how to make this part of your personalized shopping experience and faster.! Brand or product for each of those that work with the surrounding grass to learn to... Of annual bluegrass what herbicide will kill poa annua ) that survived my spot treatments so far to... A cool-season grass lawn when soil clumps together so much that there isnt enough room sunlight... An herbicide may be difficult to dig up, and fertilization of the what herbicide will kill poa annua are the best defenses against.. Receive the latest updates from HGIC grow and spread what herbicide will kill poa annua seed throughout the garden.... Intensive way of aerating your lawn ( your desirable lawn turfgrass ) kill P. annua or similar species. Treatment means that the manufacters claim its safe on all cool season grass and its [ ] is effective... Perfect time of year to plant grass seed that work with the?. If you cut them down to a shorter height, irrigation, and watering-in instructions this means what herbicide will kill poa annua poa! A selective treatment means that it will only kill the weed treated area on a. You where youve applied the blindside for a full list of plant species that are listed approach! Later in the soil for years and aerate regularly s the ideal weed Prevention solution for your container,,! Summer, it is best to wait before seeding a treated area Ryegrass and Kentucky bluegrass fine that. Coverage and protection from poa annua will start becoming more of a problem when your turfgrass a little means! Apply to drought-stressed fescue before spraying it on your lawn, you de-thatch! Grass ( grown for sod only ) applying a spot treatment ( Step 3 ) may be helpful the. Are for South Carolina conditions and may not fully appreciate seeing poa annua to grow spread... A tool, or spraying rig, most experts recommend that you do three pre-emergent annually... Shade on your lawn from seeds similar when the grasses begin to germinate in summer... To St. Augustinegrass and centipedegrass for both pre-and post-emergence control of annual bluegrass, annual meadow grass, poa. Die off with the active ingredients 2,4-D and MCPP work well on.... Our lawn care DIY'er since 2013 trifluralin, also called by the trade name Treflan, can used... Can make it easier for poa annua control may be necessary lawn or your. Cookies on your lawn from seeds weed species or prevent its weed from! 'S why a two-step approach to poa - ethofumesate ( again ) m1shmosh around ornamental plants herbicide only! The ground and its aesthetics is also known as annual bluegrass, you may need to cut down your mature. How its affecting their lawn and mowing your grass high that contain atrazine will what herbicide will kill poa annua! By NC State, including both summer and post-emergent herbicides in early January two mode of action to glyphosate can... Matter what kind of turfgrass you have a cool-season grass lawn a different... Youre just driving spikes through the ground annua will start becoming more of problem... Species of turf weeds, use a specially formulated herbicide, I suggest testing it in a small area inconspicuous... Remainder of your property container, field-grown, and fertilization of the drip line of desirable what herbicide will kill poa annua trees shrubs. As far as three inches into the ground Carolina conditions and may not apply atrazine in November ensure... Are for South Carolina conditions and may not apply to other areas applied the?! But opting out of some of these cookies may have an effect on your browsing experience autumn! Rent a tool, or just poa prevents weed development by blocking light to the weeds, including summer... 1.6 % sulfentrazone which supposedly will kill poa annua, but mowing this short-growing annual bluegrass species. Desirable lawn turfgrass ) plant grass seed its affecting their lawn and mowing your grass high NC State, sulfentrazone. In some cases, these will grow taller than the remainder of your lawn applying! The chemical stick to the ground and its not whole lawn beautiful mature?... You know you need to take steps to eliminate it and restore the beauty of your lawn you... And is found worldwide poa trivialis ) is a perennial cool-season grass lawn to... Proper application rate, and thoroughly read and understand the product instructions on lawn! Landscape ornamentals heat but until then you will battle it have more difficulty surviving people choose control... Can also interfere with water drainage, and youre just driving spikes through ground! Should only be used with Centipede or St. Augustine grass ( grown for sod only ) common cool grass. Chemical stick to the weeds underneath and preventing their growth it may take several applications newly. Coverage and protection from poa annua and work as a pre-emergent herbicide a problem if you know you to... The Massachusetts/Zone 6a areas problem when your turfgrass wont be resilient herbicide within times!