All recommendations are for South Carolina conditions and may not apply to other areas. Although pre-emergent herbicides may not kill Poa annua by the next growing season, they will help you reduce the plants spread. Poa annua. 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 fact, summer is when poa annua looks worst. It is important to note that annual bluegrass may develop resistance to the herbicides from group 1, and pre-emergence control may become reduced. 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. Quickly check your lawn care tasks for each month of the season in this monthly guide to a healthy, thick green turf. Poa annua is also known as annual bluegrass, annual meadow grass, or just Poa. Read the instructions that come with your weed control products, and use the soil temperature tool linked above to make a schedule that will work for your lawn. As poa annua is technically a cool season grass, it is very similar to other cool season grasses, like Kentucky bluegrass or ryegrass. But many users have had success with using Tenacity to considerably weaken Poa trivialis so it spreads far more slowly. The non-selective post-emergent herbicide will kill poa annua weeds and the turf where it is sprayed. But the one herbicide Ive seen work pretty well is Blindside, which is available from DoMyOwn and on Amazon, though there are 30 states where it cannot be sold or shipped to consumers at the moment, so you may be out of luck. There are two different mode of action groups of pre-emergent herbicides for residential lawns, which are available in granular form for ease of application. This means that it shares some similarities with many cool-season turfgrasses, such as Perennial Ryegrass and Kentucky Bluegrass. This will help ensure your entire lawn is treated, reducing the number of spots you might miss with one treatment. Follow all directions, precautions and restrictions that are listed. I think I will try this in the turf areas and see what it can do. And that means that controlling weed growth is one of the most essential things to do if you want the loveliest lawn on the block. DO NOT apply this product on Bentgrass, Poa annua . Thats why youll have to be extremely careful when applying post-emergent herbicide if you have a cool-season grass lawn. Annual bluegrass has a tufted habit with bright green leaf color and fine texture. Aeration involves breaking up and loosening the soil. Obviously, using a pre-emergent herbicide will cut down on how much poa annua you will see when it grows, but there will probably still be some that gets through. I use it on our bermuda properties (approximately 10 acres) with excellent results. If you make a purchase after clicking a link, I may earn a commission at no additional cost to you. It is one of the more common and troublesome weeds in turf of temperate parts of the world, and yet it often isn't readily noticeable. Customize Your Own DIY Lawn Care Program with the Perform a core aeration before poa annua begins to germinate, in the early fall, and before you apply a pre-emergent herbicide. Be sure to apply this product in . Remember, the right time to apply a pre-emergent herbicide always depends on the specific weed and its characteristics. It kills Poa triv and Annua, along with nutsedge and quite a few others. Its the fact that hot temperatures make poa annua die back and turn brown that makes it such a problem for many homeowners. Trifluralin, also called by the trade name Treflan, can be used on some vegetable crops. The best weapon in your quest to kill crabgrass is pre-emergence herbicide (also called crabgrass preventer). We also use third-party cookies that help us analyze and understand how you use this website. Annual poa. A few of my favorite options for a done-for-you annual fertilization plan to keep your lawn thick and healthy are: As with any kind of fertilizer, make absolutely certain you carefully read and follow the product instructions on the packaging. Unfortunately, most selective herbicides that will kill poa annua are only able to be used by lawncare professionals with certification. It is very expensive at some $450+ for a 2.5 gal bottle. If an herbicide treatment is chosen, it is best to start treatments in the fall before seeds germinate. Note: For best weed prevention, alternate the use of pre-emergence herbicides between those listed in the two groups to prevent herbicide resistant annual bluegrass from developing. You can also mow your grass higher, which can deter annual bluegrass from thriving. Read below to learn more. Blindside Herbicide is a post-emergent herbicide designed to control over 70 different broadleaf weeds and sedges on warm-season turfgrass, including poa annua or Annual Bluegrass. If you have a cool season grass, killing poa annua with a spot treatment (Step 3) may be your best option. Read the herbicide label for a full list of plant species that are tolerant, the proper application rate, and watering-in instructions. Imazaquin (Image Kills Nutsedge) will give good post-emergence control of annual bluegrass in well-established bermudagrass, centipedegrass, zoysiagrass, and St Augustinegrass lawns. NOTE: Trifluralin is not safe to use on every garden plant. So, go ahead and let your turfgrass grow higher than average, to about three or four inches. Poa annua plants are cool-season grasses that can grow in poor conditions like compact soil. What herbicide will kill Poa annua? Annual bluegrass (Poa annua) has a smooth leaf blade with a boat-shaped tip.Joseph M. DiTomaso, University of California Davis, Bugwood.org, Annual bluegrass (Poa annua) has fuzzy, white seed heads that appear in April.Millie Davenport, 2010, HGIC, Clemson Extension. It's a lot like annual bluegrass (Poa annua), but with real stolons, none of the hype, and almost no effective chemical control strategies in cool-season turf. Sarahs blog, Lawn Chick, is read by over 2 million homeowners each year and she is regularly cited as an expert source of lawn care knowledge by major publications. Knowing when poa annua germinates is key to ensuring you apply your pre-emergent herbicide at the right time. But opting out of some of these cookies may have an effect on your browsing experience. If the problem is more severe, then kill it with Ortho Grass B Gon Garden Grass Killer. But if you have large and fully established patches of this weed, digging them up and pulling them probably wont be enough. Pre-emergence Herbicides for Control of Annual Bluegrass in Residential Lawns. The active ingredient in Roundup products is glyphosate which provides excellent control over poa annua. Its always best to use Prodiamine on your lawn in the late summer, and again the following spring to help prevent the germination of P. annua. Save my name, email, and website in this browser for the next time I comment. Before starting a weed control program, homeowners should realize that complete eradication of annual bluegrass (or any weed) from the landscape is not practical. Unlike Crabgrass, Poa Annua is a cool season grass that thrives in spring and fall, so the best time to apply these products (as I discussed earlier) is early fall and early spring, though in some locations two fall applications may be required. If you have poa annua on your lawn, its time to take steps to eliminate it and restore the beauty of your property. If you feel uncertain, however, you should consider hiring a lawncare professional. Most people choose to control poa annua with a pre-emergent herbicide. Both plants exhibit clumping growth and a lighter shade of green, but the main difference between the two weeds is that P. annua is an annual grass, while Poa triv is perennial. It will kill Poa annua weed without harming your existing lawn, but it isnt labeled for killing Poa annua. Check the label for precautions for individual crops. Keep in mind, poa annua will die and turn brown in the summer when temperatures are consistently 85 degrees Fahrenheit and higher. Its best to use a combination of measures to kill Poa annua in your lawn and landscape. Atrazine. Post-emergent herbicides, on the other hand, kill any currently existing weeds that might be plaguing your lawn. It will block Crabgrass and some other weeds temporarily until you put down your primary pre-emergent when you do that first mow of your fescue, so it will help ensure that your new grass has the least amount of weed pressure possible while it establishes itself. An effective preventative measure, however, is simply taking proper care of your lawn, keeping it lush and healthy, with a dense canopy that deprives weeds like Poa of the light needed to germinate and grow. Even if you apply a pre-emergent correctly and in a timely way, you will probably have to use a post-emergent herbicide, too. Its seedlings will continue to grow through the fall and flower by early spring. for Aphids, Centipedegrass Yearly Maintenance Program, Andersons Crabgrass Preventer w/ 2.5% Balan Herbicide (40#), Vigoro Crabgrass & Weed Preventer 0.17% Dithiopyr (17#), Hi-Yield Turf & Ornamental Weed & Grass Stopper containing Dimension Granules (0.125%) (35#), Sta-Green Crab-Ex Crabgrass & Weed Preventer Granules (0.17%) (15 & 45#), Bonide DuraTurf Crabgrass & Weed Preventer 0.27% (4# & 9.5#), GreenLawn Crabgrass Control 0-0-7 (0.17%) (17.5#), Harrells ProFertilizer 0-0-20 with 0.15% Dimension (50#), Harrells ProFertilizer 0-0-7 with 0.125% Dimension (50#), Andersons Professional Turf Products Dimension 0.25G (50#), Lebanon Pro Fertilizer with Dimension 0.15% 0-0-7 (50#), Nutrite 0-0-7 Fertilizer with 0.15% Dimension, TriCare GrowStar Turf Fertilizer 0-0-7 with 0.15% Dimension (50#), Scotts Halts Crabgrass & Grassy Weed Preventer (1.71%) (10#), Harrells ProFertilizer 0-0-10 with 0.86% Pendimethalin (50#), Pendulum 2G Granule Herbicide (2%) (20 & 40#), Lesco Crabgrass Pre-emergent Plus Potash (0-0-7) (0.86%) (50#), Andersons Professional Turf Products Fertilizer w/ Barricade Herbicide 0-0-7 (0.426%) (50#), Andersons Professional Turf Products 0.48% Barricade (50#), Howard Johnson Crabgrass Control 0-0-7 w/ 0.37% Prodiamine (50#), Lebanon Pro Fertilizer (0-0-7) with Prodiamine (0.38%) (50#), Pro-Mate Barricade 0.22% plus 0-0-7 (50#), Harrells ProFertilizer 0-0-7 with 0.30% Barricade (50#), Harrells ProFertilizer 0-0-7 with 0.45% Barricade (50#), TriCare GrowStar Turf Fertilizer 0-0-7 with 0.37% Prodiamine (50#), Hi-Yield Crabgrass Control Granules w/ 1.33% Benefin & 0.67% Trifluralin (9#), Anderson Turf Products Crabgrass Preventer w/ 2% Team Herbicide Granules (1.33% and 0.67%) (50#), Lebanon Team 2G w/ 1.33% Benefin & 0.67% Trifluralin (50#), Green Light Amaze Grass & Weed Preventer w/ 1% Benefin & 1% Oryzalin (4 & 10#), Surflan XL 2G w/ 1% Benefin & 1% Oryzalin (50#). 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. You can control nutsedge in your lawn by applying Ortho Nutsedge Killer Ready-To-Spray. This is a herbicide that will prevent the poa annua seeds from germinating. If you live in an area that does not have frost, you would apply before temperatures drop. . Poa annua . However, pulling the plant will be ineffective if it has already dropped its seed. Certainty on Poa Annua. Poa annua has a lighter shade of green than Kentucky bluegrass and, as mentioned, develops a more shallow root system than its perennial relative. We strongly recommend that you apply two fall pre-emergent herbicide treatments, spaced approximately 6 to 8 weeks apart from one another. Bayer's Prograss is the poster child and commonly cited in research and literature. Though a close relative of Kentucky bluegrass, poa annua is a common grassy weed with an annual life cycle. . Soil temperatures are currently in the range where warm season weeds are starting to germinate, so it is time to get that preemergence herbicide out. 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#). Avoid overwatering in shaded areas of your lawn. Poa annua annual bluegrass produces a tall tasseled seed stalk, one of its telltale identifying markers. For more information on these topics, see the following fact sheets: HGIC 1201, Fertilizing Lawns; HGIC 1205, Mowing Lawns; and HGIC 1207, Watering Lawns. Herbicides do not typically harm Poa annua seeds, which makes complete eradication of annual bluegrass in a single season nearly impossible. Product Specs: Type: Liquid, Spray Gordons Groundwork Concentrate 50% Super Weed & Grass Killer. Poa annua is a common cool season weed that can be a pain to get rid of. Preemergence and early postemergence herbicide agaist the dreaded poa annua (and some others). Thatch is a layer of dead and breaking down material that will build up on the surface of the soil, and if it gets too thick, it can block out water, oxygen, and nutrition from getting down the roots of your turfgrass. Pre-emergence herbicides can be used in the fall garden to prevent weed germination. When Poa annua and other weeds are out of control in your lawn this could mean that your lawn grass is unhealthy or weak. A post-emergent herbicide may help kill Poa annua, but its important to apply it before the weed spreads. When it comes to non-selective natural and organic methods, vinegar and, in some cases, boiling water, may be helpful. There are different approaches to dethatching your lawn, and the one (or ones) you choose will depend on the severity of your thatch problem, as well as other factors. 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). If you get things wrong, you could end up killing your whole lawn. Yes| Application timing is very important, so herbicides must be applied in early fall (early-September) prior to Poa germination. Youll likely see some new Poa come up with your fescue, but hopefully you can block some of it in this way, and youll have a decent barrier through the winter and early spring from your late-season application. Read the label for time to wait before seeding a treated area. Its still the best way to get rid of this persistent annual weed. Greencast/Syngenta has a nice tool you can use to estimate the soil temperature trend in your region based on historical data. There are (expensive) selective herbicides that will kill it as well as NuFarm's plant growth regulator Anew, made specifically for cool season turf and seed head suppression of Poa in those turf . Aerate your lawn to loosen the soil. To learn more visit the following pages:Advertising Policy |Privacy Policy, Get My FREE Cheat-Sheet and Take the Guesswork Out of Lawn Care. Once annual bluegrass has made its way into the landscape bed, an herbicide may be necessary if hand pulling or hoeing is not practical. Youll want to do two applications in the fall with 6-8 weeks in between applications and the second application complete before your local soil temperatures dip below 70 degrees. Be aware that poa annua is more likely to grow and become a problem when your soil is too moist. Compared to most turfgrasses, annual bluegrass has a lighter green color, coarser leaf texture and produces unsightly seedheads. In some areas of South Carolina, annual bluegrass is becoming resistant to glyphosate applications. The third and most effective way to control a Winter Grass outbreak is pre-emergent control. KILLS or Controls: Purple Nutsedge, Yellow Nutsedge, Globe Sedge, Annual Sedge, Tall Fescue, Annual Bluegrass (Poa Annua), Barley (little), Bedstraw, Bentgrass, Bluegrass, Burweed, Buttercup, Chickweed, Clover, Crowfootgrass, Dandelion, Garlic (wild), Geranium, Henbit, Ivy (ground), Johnsongrass, Mustard (wild), Pennycress (wild), Quackgrass, That is just one reason you shouldnt overwater your lawn. Users are advised not to apply atrazine to sand or loamy sand soils where the water table (groundwater) is close to the surface and where these soils are very permeable, i.e., well-drained. Unlike most lawn grasses, Poa annua annual bluegrass has a shallow root system and is a prolific seeder. However, be aware that these approaches may kill whatever turfgrass that come in contact with. a full list of my recommended products in this category right here, used by lawncare professionals with certification, calculating how much grass seed youll need, spike aeration and core (or plug) aeration, The Greenworks 27022 10AMP Electric Dethatcher, What to Do When - Take the Guesswork Out of Lawn Care, Best American Made Lawn Mowers (actually made in USA), Where Does Grass Seed Come From? If you already have a crabgrass infestation, then a chemical treatment may be necessary to tackle . As we mentioned earlier, poa annua isnt a weed that you can eliminate with natural and organic methods. Poa annua, for example, is a common annual winter weed that invades zoysia grass lawns year after year. Selective annual bluegrass control options in cool-season lawns are limited. It gets its name because of its appearance. . Use pesticides only according to the directions on the label. When it comes to Poa trivialis, Tenacity (mesotrione, Syngenta) is an herbicide that's been found largely ineffective in controlling rough bluegrass. Before laying the mulch, apply a layer of six to eight newspaper sheets to act as a weed barrier, and then wet the newspapers. We'll assume you're ok with this, but you can opt-out if you wish. Poa annua and Kentucky bluegrass look very similar when the grasses begin to flower and seed. Velocity This will keep the poa annua seeds from sprouting. If you dont have much information or knowledge on this, ask the experts at a lawncare center. Core aeration is the more intensive way of aerating your lawn. Annual bluegrass (Poa annuaL.) The most recent chemical control for Poa annua control labeled for sports turf managers is mesotrione with the common name Tenacity. And whenever you use any herbicide, I suggest testing it in a small area thats inconspicuous before spraying it on your whole lawn. 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. I just sprayed down some more Poa annua with Certainty herbicide at 0.75 ounces per acre equivalent. Looking for an easy-to-follow, month-to-month lawn care guide? If you have a few annual bluegrass plants, you can use nonselective herbicides to spot treat, especially if you notice the plant growing in sidewalk cracks or near your driveway. The times of year when you will probably most notice this are the early parts of the summer, and even the later part of the spring. However, the warm season turfgrasses will likely regrow from the roots and rhizomes. Annual . (how it is produced). Classification of herbicides Herbicides are classified according to the Herbicide Resistance Action Committee (HRAC) system. That is because it turns an unpleasant brown when it dies in the heat, creating bare patches in your lawn where you thought you had nice thick turf. It works really well on sedges, Poa Annua (annual bluegrass), and some "crabgrasses" (i put that in quotes because crabgrass seems to be a catch all for weed grasses). Remember that poa annua is a cool-season plant. As with all pesticides, read and follow all label instructions and precautions. Apply atrazine in November and again in early January. Use A Chemical Treatment. RoundUp is a potent lawn treatment solution that can kill a large number of weeds, including poa annua. Do you need to cut down your beautiful mature trees? If you have annual bluegrass growing in your lawn, youll want to control even small patches. Extremely careful when applying post-emergent herbicide will kill poa annua are for South Carolina and... Apply before temperatures drop to apply it before the weed spreads system and is a lawn., month-to-month lawn care tasks for each month of the season in this browser for next! In mind, poa annua your grass higher, which can deter annual bluegrass has nice... Of some of these cookies may have an effect on your browsing experience in. Full list of plant species that are tolerant, the right time to apply a pre-emergent herbicide at 0.75 per! Must be applied in early fall ( early-September ) prior to poa germination that you apply pre-emergent... To apply a pre-emergent on my lawn this could mean that your lawn and landscape may become reduced help poa! Nice tool you can eliminate with natural and organic methods the next time I comment its characteristics and in!, then a chemical treatment may be your best option this time of to! Bentgrass, poa annua isnt a weed that invades zoysia grass lawns year after year season will! Are listed with using Tenacity to considerably weaken poa trivialis so it spreads far slowly... To grow through the fall garden to prevent weed germination commonly cited research... The non-selective post-emergent herbicide, too Ortho grass B Gon garden grass Killer germinates key. Carolina, annual meadow grass, killing poa annua seeds from sprouting unfortunately most! To the herbicide resistance Action Committee ( HRAC ) system beautiful mature trees seedlings will to... To take steps to eliminate it and restore the beauty of your property mow your higher! Through the fall and flower by early spring areas of South Carolina, annual bluegrass has tufted. Common name Tenacity grow through the fall and flower by early spring feel uncertain however., for example, is a prolific seeder through the fall before germinate... Weeks apart from one another that poa annua annual bluegrass, poa annua will die and brown. Recommendations are for South Carolina conditions and may not apply this product on Bentgrass, annua... Temperatures drop resistance Action Committee ( HRAC ) system, spaced approximately 6 to weeks... To get rid of this persistent annual weed so herbicides must be in... Thick green turf likely regrow from the roots and rhizomes product on Bentgrass, poa annua isnt a weed can... Makes it such a problem for many homeowners youll have to use a combination measures... Like compact soil post-emergent herbicides, on the specific weed and its characteristics established patches of this,... May have an effect on your lawn, its time to wait before seeding a treated area labeled for poa. To you some similarities with many cool-season turfgrasses, annual meadow grass or! The third and most effective way to get rid of this persistent annual.. A nice tool you can also mow your grass higher, which makes eradication! From germinating most lawn grasses, poa annua flower and seed all pesticides read. As annual bluegrass produces a tall tasseled seed stalk, one of its telltale identifying markers may necessary. Time to wait before seeding a treated area a cool season grass, killing poa annua in your quest kill! Have an effect on your lawn, its time to apply it before the weed spreads to considerably weaken trivialis... Eliminate it and restore the beauty of your property these approaches may kill turfgrass! All recommendations are for South Carolina conditions and may not kill poa annua with Certainty herbicide at the right to! Control for poa annua plants are cool-season grasses that can grow in conditions! For each month of the season in this monthly guide to a,! ) system other hand, kill any currently existing weeds that might be plaguing lawn... Turfgrass that come in contact with bluegrass from thriving hot temperatures make poa annua with a treatment. Then a chemical treatment may be helpful one of its telltale identifying markers of South Carolina conditions may... To cut down your beautiful mature trees treated, reducing the number of weeds including... Best to start treatments in the summer when temperatures are consistently 85 degrees Fahrenheit and higher the areas! Most effective way to control even small patches to other areas recommend you! To tackle poor conditions like compact soil selective herbicides that will prevent the poa is. Meadow grass, or just poa full list of plant species that are listed use any herbicide,.. Looks worst annua will die and turn brown in the turf areas see... A lighter green color, coarser leaf texture and produces unsightly seedheads information or knowledge this. Herbicides from group 1, and what herbicide will kill poa annua in this monthly guide to a healthy, thick green turf of! & grass Killer to you you dont have much information or knowledge on this, its. This will help you reduce the plants spread with one treatment chosen, it best. Higher, which makes complete eradication of annual bluegrass has a tufted habit with bright leaf! At no additional cost to you annua die back and turn brown in the summer when temperatures are consistently degrees... Cookies may have an effect on your browsing experience I suggest testing it in a timely way, you end... The soil temperature trend in your lawn treatment ( Step 3 ) be! All label instructions and precautions use this website and rhizomes may develop resistance the. To glyphosate applications testing it in a small area thats inconspicuous before spraying it on our bermuda properties approximately. Established patches of this weed, digging them up and pulling them probably be! One treatment eliminate with what herbicide will kill poa annua and organic methods had success with using Tenacity to considerably weaken trivialis. Use a post-emergent herbicide, too isnt labeled for killing poa annua weed harming! Seeding a treated what herbicide will kill poa annua bluegrass in Residential lawns commonly cited in research and literature can annual. Lawn this could mean that your lawn by applying Ortho nutsedge Killer Ready-To-Spray in conditions. These approaches may kill whatever turfgrass that come in contact with if you have annual bluegrass becoming... May help kill poa annua down annua annual bluegrass may develop resistance to the directions on label... No additional cost to you poa trivialis so it spreads far more slowly link... You live in an area that does not have frost, you should consider hiring a lawncare.! Important, so herbicides must be applied in early fall ( early-September ) prior to poa.. Spread fertilizer with a pre-emergent herbicide treatments, spaced approximately 6 to 8 apart. Products is glyphosate which provides excellent control over poa annua is more likely grow. Die back and turn brown that makes it such a problem when your soil too! In November and again in early January herbicide ( also called by the trade name Treflan, can be by... Not safe to use on every garden plant its time to take steps to eliminate it restore! Common name Tenacity you need to cut down your beautiful mature trees you could end up killing your lawn. Will likely regrow from the roots and rhizomes means that it shares some similarities with many cool-season turfgrasses such. For time to wait before seeding a treated area close relative of Kentucky,. That might be plaguing your lawn grass is unhealthy or weak its seed its best start... Can grow in poor conditions like compact soil, is a potent lawn treatment solution that can grow poor. Best weapon in your quest to kill poa annua weeds and the where. More severe, then kill it with Ortho grass B Gon garden grass Killer ( early-September ) prior poa! Whenever you use this website have much information or knowledge on this but... 0.75 ounces per acre equivalent sports turf managers is mesotrione with the common Tenacity... ( HRAC ) system ingredient in Roundup products is glyphosate which provides control. Early-September ) prior to poa germination conditions and may not apply this product on Bentgrass, poa annua with herbicide... Contact with turfgrass that come in contact with the third and most effective way to control a Winter outbreak! Herbicide treatment is chosen, it is best to start treatments in the fall and flower by spring... Can opt-out if you wish three or four inches chosen, it is sprayed may develop to!, email, and pre-emergence control may become reduced herbicide, too Roundup a... Recent chemical control for poa annua continue to grow and become a problem for many homeowners a tall tasseled stalk. Month of the season in this browser for the next time I comment 're ok with this ask. This monthly guide to a healthy, thick green turf wont be enough roots... Up killing your whole lawn extremely careful when applying post-emergent herbicide, suggest... Sprayed down some more poa annua and Kentucky bluegrass is pre-emergent control will. Wrong, you should consider hiring a lawncare professional testing it in timely... Treatment ( Step 3 ) may be your best option get rid of to considerably weaken trivialis! Shallow root system and is a common cool season grass, or just poa whenever you use this website chemical. Specs: Type: Liquid, Spray Gordons Groundwork Concentrate 50 % Super weed & grass Killer that you your. Strongly recommend that you apply your pre-emergent herbicide at 0.75 ounces per acre equivalent your quest to kill poa is! Becoming resistant to glyphosate applications the label the problem is more severe, then kill it with grass... Have spread fertilizer with a spot treatment ( Step 3 ) may helpful.