Annual bluegrass check (2023)

Annual bluegrass check (1)

annual grass (poa anual) grows with a clustered growth habit.
Millie Davenport, © 2010, HGIC, Clemson Extension

annual grass (poa anual) is a cool season annual grass that propagates by seed. Annual bluegrass has a tufted habit with finely textured glossy green leaves. It is native to Europe and is found all over the world.

Annual bluegrass has smooth leaves with a boat-shaped tip. It produces greenish-white seed heads throughout its lifecycle, with most appearing during the spring months. It can be found growing in a wide variety of conditions, but prefers areas with moist and/or compacted soil.

Before starting a weed control program, homeowners should realize that complete eradication of annual bluegrass (or any weeds) from the landscape is impractical. A more realistic approach is to manage (not eradicate) the weed by reducing the infestation to a tolerable level.

Annual bluegrass check (2)

annual grass (poa anual) has a smooth blade with a boat-shaped tip.
Joseph M. DiTomaso, University of California – Davis,

(Video) Poa Annua - [How to Get Rid of Annual Bluegrass] - ONE SIMPLE PRODUCT

Annual bluegrass check (3)

annual grass (poa anual) has white, hairy seed heads that appear in April.
Millie Davenport, ©2010, HGIC, Clemson Extension

lawn control

Maintaining the health and density of the lawn is the best method of preventing a weed problem. Proper mowing height, watering and fertilizing the lawn are the best defenses against weeds. For more information on these topics, see the following factsheets:HGIC 1201, Fertilizing Lawns;HGIC 1205, Grass Cutting;yHGIC 1207, lawn irrigation.

(Video) Q&A – How do you control annual bluegrass in a fine fescue lawn?

If annual bluegrass becomes a problem in a turf area, it can easily be dug up before it is well established. Large patches can be difficult to dig up and an herbicide may be necessary. If a herbicide treatment is chosen, it is best to start treatments in the fall, before the seeds germinate. In the spring, when seed heads become visible, cut frequently to about 2 inches tall with a bagger on the mower to collect annual bluegrass seeds to help prevent seeds from scattering.

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. For most products, a second application should be applied 8 to 10 weeks later in the fall for continued control.

As annual resistance to the bluegrass herbicide has recently emerged, it is best to alternate between the two different types of pre-emergence herbicides to achieve the best weed control. Many of the common pre-emergence herbicides available to homeowners are closely related in how they prevent weed seeds from germinating. Therefore, when subsequent herbicides are applied, they must have a different mode of action. There are two different groups of pre-emergent herbicide modes of action for residential lawns, which are available in granular form for ease of application. All are capable of giving good to excellent control of annual bluegrass.

The most common products are in group 1 (these are called dinitroaniline herbicides), and these includeto benefit,managed,original,pendimethalin,prodiamine, youtrifluralina🇧🇷 The second chemically different group (the class of cellulose biosynthesis inhibitor herbicides) includesindaziflam.

Table 1 lists granular products within these two mode of action groups. All herbicides are labeled for use on centipede grass, zoysia grass, bermuda grass, St. Augustine and tall fescue grasses, except indaziflam, which cannot be used on tall fescue grasses.

It is important to note that annual bluegrass can develop resistance to group 1 herbicides, and pre-emergence control can be reduced. Therefore, for best pre-emergence control of this herbaceous weed, alternate applications with Group 1 and Group 2 products, or at least alternate annually between the two groups of herbicides. Read the product label to find out how long each herbicide will last so you can decide when to do a second application in the fall.

Note that if any of these pre-emergent herbicides are applied in the fall to a tall fescue lawn, those lawns cannot be covered with additional fescue that fall. However, spring overlap with tall fescue is possible around March 1st.S t, if spring applications of pre-emergent herbicides are not made for summer weed prevention. Read the product label for the duration of control.

Apply each granular product at the rate on its label topoa anualcontrol and water in the product after application. Examples of residential landscaping products in residential sizes are listed in Table 1.

There are pre-emergence herbicides on the market that combine nitrogen-containing fertilizers along with the herbicide. However, the best time to apply pre-emergence herbicide is not the best time to apply nitrogen fertilizer to warm season turfgrasses. Only those with 0-0-7 fertilizer (7% potassium, or just some percentage of potassium) are listed, as they can be applied at the right time for better weed prevention.

(Video) How To Kill Annual Bluegrass ( P O A )

Table 1. Pre-emergence herbicides for controlling annual bluegrass in residential turfgrasses.

Active ingredientExamples of brands and products
Group 1 Mode of action Pre-emergence herbicides
to benefitLebanon Balance 2.5G (2.5%) (40#)
Andersons Crabgrass Preventer with 2.5% Balan herbicide (40#)
managedVigoro Crabgrass & Weed Preventer 0,17% Dithiopyr (17#)
High performance turf and ornamental grass plug containing dimension granules (0.125%) (35#)
Sta-Green Crab-Ex Crabgrass & Weed Preventer Granules (0,17%) (15 e 45#)
Bonide DuraTurf Crabgrass & Weed Preventer 0,27% (4# y 9,5#)
Controle GreenLawn Crabgrass 0-0-7 (0,17%) (17,5#)
Harrell's ProFertilizer 0-0-20 with 0.15% dimension (50#)
Harrell's ProFertilizer 0-0-7 with 0.125% dimension (50#)
Anderson's Professional Turf Products Dimension 0.25G (50#)
Vereens 0-0-7 com 0.13% dithiopyr
Combine 0-0-7 com 0.25% ditiopir
Lebanon Pro Fertilizer with Dimension 0.15% 0-0-7 (50#)
Nutrite 0-0-7 Fertilizer with 0.15% Dimension
TriCare GrowStar 0-0-7 Lawn Fertilizer 0.15% Dimension (50#)
pendimethalinScotts detiene Crabgrass & Grassy Weed Preventer (1,71%) (10#)
Harrell's ProFertilizer 0-0-10 com 0.86% pendimethalin (50#)
Herbicide granules Pendulum 2G (2%) (20 and 40#)
Lesco Crabgrass Preemergent Plus Potash (0-0-7) (0,86%) (50#)
prodiamineAnderson's Professional Turf Products Fertilizante con Barricade Herbicida 0-0-7 (0,426%) (50#)
Anderson's Professional Turf Products 0,48% Barricade (50#)
Howard Johnson Crabgrass Control 0-0-7 com 0,37 % de prodiamina (50#)
Lebanon Pro (0-0-7) Fertilizer with Prodiamine (0.38%) (50#)
Barricade Pro-Mate 0.22% plus 0-0-7 (50#)
Harrell's ProFertilizer 0-0-7 with 0.30% Barricade (50#)
Harrell's ProFertilizer 0-0-7 with 0.45% Barricade (50#)
TriCare GrowStar 0-0-7 lawn fertilizer with 0.37% prodiamine (50#)
Benefine and trifluralineHigh Performance Crabgrass Control Granules with 1.33% Benefin and 0.67% Trifluralin (9#)
Anderson Turf Products Crabgrass Preventer with 2% Granulated Herbicide Kit (1.33% and 0.67%) (50#)
Team Lebanon 2G com 1,33% Benefin e 0,67% Trifluralin (50#)
Benefin e orizalinaGreen Light Amaze Grass e Weed Preventer com 1% Benefin e 1% Oryzalin (4 e 10#)
Surflan XL 2G com 1% Benefin and 1% Oryzalin (50#)
Group 2 Mode of action Pre-emergence herbicides
IndaziflamBayer show (scholarship no. 50)
Note: For best weed prevention, alternate the use of pre-emergence herbicides between those listed in the two groups to prevent the development of herbicide-resistant annual bluegrass.

CAUTION:Pre-emergence herbicides are non-selective and can prevent grass seed development and root development in twigs, turf and grass clods. Read the label for the waiting time before seeding a treated area. It is best to wait six months after starting a new lawn before applying pre-emergence herbicides.

find outis a very different herbicide that can be applied alone to Saint Augustine grass and centipedes for pre and post emergence control of annual bluegrass. Apply atrazine in November and again in early January. Atrazine can be applied up to twice a year. It should NOT be applied to newly seeded grass due to its detrimental effect on seed development. Delay atrazine applications on newly cut and branching grasses until they are well established and actively growing. Do not apply atrazine to grasses that are turning green in the spring, as serious damage to the grass can occur. Examples of atrazine products for residential landscaping in residential sizes are:

  • High performance atrazine herbicide concentrate
  • Southern Ag Atrazine St Augustine Herbicida Concentrado

CAUTION:Atrazine can travel through soil and enter groundwater; therefore, read the label for all environmental precautions. Users are advised not to apply atrazine to sandy or sandy loam soils where the water table (groundwater) is close to the surface and where these soils are highly permeable, ie well drained. Do not apply atrazine herbicide within twice the drip line width of desirable hardwood trees and shrubs.

Imaginary(Image Kills Nutsedge) will provide good post-emergence control of annual bluegrass in well established bermudagrass, centipedegrass, zoysiagrass and St Augustinegrass turfgrass. Full control may require 2 spray applications. The best weed control is in the fall when weeds are small. Water the spray product into the soil within 1-7 days for better control. Do not spray imazaquin on St Augustine lawns for winter weed control. Read product label for mixing, use and other restrictions.

non-selective herbicidesglyphosatecan be used for localized treatments; however, nearby grasses and desirable plants can be severely damaged. Glyphosate is most effective when applied to young weeds in November. Annual bluegrass plants that grow in April and May will die as temperatures rise, so there is no need to treat them at this time. Examples of glyphosate products in residential sizes are:

  • Original Roundup Concentrate,
  • Herbicida Roundup Pro,
  • Martin's Eraser Systemic Weed & Grass Killer,
  • Quick weed and weed remover
  • Bonide Kleenup Weed & Grass Killer 41% Super Concentrado,
  • High performance Kill-Zall aquatic herbicide
  • Maxide Super Concentrate 41% Weed and Grass Killer,
  • Killzall Weed & Grass Killer Super Concentrado,
  • Tiger Brand Fast Elimination Concentrate,
  • Ultra Kill Weed & Grass Killer Concentrado,
  • Gordon's Groundwork Concentrate 50% Super Weed and Grass Killer,
  • Zep Enforcer Weed Defeat Focused,
  • Eliminator Weed & Grass Killer Super Concentrado,
  • Monterey Remuda Full Strength 41% Glyphosate,
  • Knock Out Weed & Grass Killer Super Concentrado,
  • Concentrate II for southern states herbicides and herbicides,
  • Herbicide to kill weeds and grasses Total Kill Pro,
  • Ace concentrated weed and weed remover.

To use:After the annual bluegrass on the lawn is removed, the uncovered areas will remain. To prevent new weeds from invading these gaps, plan to fill them in with sod, clods, or sprigs of your desired grass at the proper time of planting. In some areas of South Carolina, annual grasses are becoming resistant to glyphosate applications. In this case, a recording applicationd-limoneno(citrus oil), as in Avenger Weed Killer Concentrate for Organic Gardening, will kill anything you sprinkle on it. However, warm season grasses will likely regrow from the roots and rhizomes. For more information on renovating a lawn, seeHGIC 1204, turf renovation.

control in orchards

When planning a vegetable garden, it is best to try to treat weeds before cultivating the soil. Cultivation can break and spread weed seeds throughout the garden. Some methods used to reduce weeds in the garden include hand pulling, weeding, mulching and post-emergence herbicide application.

Pulling weeds by hand or with a hoe is just one practical option for small vegetable gardens. If you choose to pull by hand, be sure to work when the soil is damp so the roots can be easily removed. When growing between rows to control weeds, be careful not to damage the roots of the crop.

(Video) How To Get Rid Of Annual Bluegrass (Poa Annua) In Your Lawn

Organic mulch (such as pine needles, compost, bark mulch, or old hay) can be used in the garden to help suppress annual bluegrass development. Before mulching, place six to eight sheets of newspaper to act as a weed barrier, then dampen the newspaper. The newspaper layer prevents weed development by blocking light to the weeds below and preventing their growth. Best of all, the newspaper should decompose before the following spring. To avoid low oxygen levels in the root zone, keep levels of organic mulch no more than 3 inches deep. For more information on mulching a vegetable garden, see.

Pre-emergence herbicides can be used in the fall garden to prevent weeds from germinating.trifluralina, also called by the commercial name of Treflan, can be used in some vegetables. It should be applied to prepared soil and embedded 2 inches deep before planting. NOTE: Trifluralin is not safe for use on all garden plants. Consult the herbicide label for application timing and safety for each crop species, proper application rate, and irrigation instructions. Examples of products containing trifluralin for use in home gardens are:

  • Preen Garden Weed Preventer granules containing Treflan
  • High performance herbicide granules containing Treflan
  • Monterey Vegetable and Ornamental Weeding - Concentrate to Prevent Weeds and Grass
  • Miracle-Gro Garden Weed Prevention Granules

Finally, a non-selective post-emergence herbicide can be used to treat the garden before planting. Avenger concentrated herbicide for organic gardening containsd-limoneno(citrus oil) and can be applied in the garden up to 3 days before planting. See label for precautions for individual cultures. Burning sprays are most effective when weeds are actively growing. Poor control can occur during extreme heat, cold, or drought conditions.

control in construction sites

In flower beds, annual bluegrass can be dug up by hand or controlled with an herbicide. As mentioned above, it's best to prevent the annual bluegrass invasion by maintaining ideal growing conditions and using a 3-inch layer of mulch to block weed development. Once the annual bluegrass has reached the landscape bed, an herbicide may be necessary if pulling by hand or hoe is not practical.

Pre-emergence herbicides can be used to prevent weed germination in the fall.trifluralina, also called by the trade name Treflan, can be applied around certain garden plants. Read the herbicide label for a complete list of tolerant plant species, proper application rate, and watering instructions. Examples of products containing trifluralin for use in home gardens are:

  • Preen Garden Weed Prevention Granules
  • High performance herbicide granules containing Treflan
  • Monterey Vegetable and Ornamental Weeding - Concentrate to Prevent Weeds and Grass
  • Miracle-Gro Garden Weed Prevention Granules
  • Snapshot 2.5 TG Granules (also contains isoxaben for additional broadleaf weed prevention)

managedIt is another excellent pre-emergence herbicide to use around many ornamental landscape plants to prevent weeds. Read the herbicide label for a complete list of tolerant plant species, proper application rate, and watering instructions. Examples of products containing ditipyr for use in home gardens are:

  • High performance turf and ornamental grass plug containing dimension granules (0.125%) (35#)
  • 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 & Herbicida Ornamental 0-0-7 (50#)

glyphosatecan be used for spot treatments around ornamental plants. However, glyphosate is a non-selective herbicide that can harm any plant and should be used with caution. Do not allow glyphosate spray to come into contact with ornamental foliage or stems as injury may result. For examples of glyphosate products in residential sizes, see the list in the "Lawn Control" section. As with all pesticides, read and follow all label instructions and precautions.

Pesticides are updated annually. The latest updates were made on August 21st by Joey Williamson.

Originally Posted on 10/5

(Video) Annual Bluegrass INVASION

If this document does not answer your questions, please contact HGIC athgic@clemson.eduo 1-888-656-9988.


How do you take care of annual bluegrass? ›

In order to effectively control annual bluegrass, preemergence herbicides must be concentrated in the upper 0.25 to 0.33 inch of the soil profile. Retention on leaf tissue can be avoided by irrigating turf immediately after application for effective soil incorporation and herbicide activation.

Should I remove annual bluegrass? ›

If solitary plants of annual bluegrass are found, they should be removed before seed production starts. Isolate small areas of infestation until control can be accomplished. Hand pulling or hoeing to remove annual bluegrass can be effective as long as it is done frequently.

How do you identify annual bluegrass? ›

Annual bluegrass has a tufted habit with bright green leaf color and fine texture. It is native to Europe and is found worldwide. Annual bluegrass has smooth leaves with a boat-shaped tip. It produces greenish-white seed heads throughout its life cycle with the majority appearing during the spring months.

What causes annual bluegrass? ›

Much like overwatering, mowing the lawn too often can create the ideal environment for annual bluegrass growth. Short grass makes it easier for annual bluegrass and other weeds to germinate quickly, whereas tall turf grass shades the soil and prevents weeds from entering the top layer of dirt.

Does annual bluegrass come back every year? ›

It grows abundantly in the Spring, producing a lot of seeds. It then dies in the hot weather of Summer and germinates during the early Fall, so it can return the following Spring to populate your lawn once again.

Does bluegrass need a lot of water? ›

A Bluegrass lawn needs plenty of water to grow well. In drought it will discolor, thin, and eventually die. In general, a Bluegrass lawn will need 1-1.5 inches of water every 7-10 days during the summer, whether from rain or irrigation. Try to water deeply and infrequently.

When should you throw out annuals? ›

Another good idea is to remove annual flowers after a killing frost. In addition, perennials that show signs of disease should be cut back in the fall. Healthy perennials can be cut back in the fall or spring. Perennials that provide winter interest, such as ornamental grasses, should be cut back in early spring.

Is annual bluegrass crabgrass? ›

Similar to annual bluegrass, crabgrass grows in clumps, but its blades are thicker and crabgrass doesn't show seedheads like Poa Annua and Roughstalk.

How do I get rid of poa annua bluegrass? ›

One method for controlling Poa annua is by using a pre-emergent or post-emergent herbicide. Chemical control is often the best approach if Poa annua has spread throughout your entire lawn.

What does poa look like in lawn? ›

Poa annua is bright green and will appear much brighter that your lawn. Poa annua has smooth leaves with a pointed "boat shaped" tip. Poa annua grows in clumps, or a bunch-type pattern. You will not find poa annua growing in individual blades, but always in clumps.

What is the difference between annual bluegrass and Kentucky bluegrass? ›

Kentucky Blue Grass yields a beautiful, lush, dark green lawn while Poa Annua (annual blue grass) spreads rapidly and dies quickly, often leaving you with a patchy lawn. Fun fact: Many homeowners find Poa Annua undesirable but some golf courses find it very desirable.

What herbicide kills poa annua? ›

Poa annua should be removed before it flowers and produces seed. Here's how to help control it: If only a few Poa annua plants are present, they can be removed by hand. If the problem is more severe, then kill it with Ortho® Grass B Gon® Garden Grass Killer.

Will Kentucky bluegrass choke out other grass? ›

It can survive damage that would kill other grasses. Even if the grass is removed at ground level, bluegrass could still grow back because of the underground growing points on the rhizomes. Kentucky bluegrass has better cold tolerance than other cool season grasses.

Is annual bluegrass good for horses? ›

Bluegrass is an excellent horse pasture forage because it's nutritious, palatable, and tolerant of close grazing.

Will bluegrass reseed itself? ›

Unlike bunch-forming grasses, such as tall fescue and ryegrass, Kentucky bluegrass is a self-spreading, sod-forming grass. Once established, it spreads readily via underground stems known as rhizomes to form a dense, thick turf. This aggressive growth habit gives KBG the capacity to recuperate quickly from damage.

What kills Kentucky bluegrass? ›

If Kentucky bluegrass is already established on your lawn, post-emergent products will have to do. Our top recommendation is Certainty Herbicide. Barricade contains Prodiamine, a highly effective active ingredient that controls and prevents seeds from sprouting.

How tall does annual bluegrass get? ›

It tolerates very close mowing, so leaves can range from 1/2 inch to 11 inches tall, depending on where it grows. Growth is erect and arching. Annual bluegrass leaves are light green in color, especially when compared to its close relative, Kentucky bluegrass (Poa pratensis).

What is the best fertilizer for bluegrass? ›

Use high-nitrogen, low-phosphorus fertilizer like 18-0-4 that includes a pre-emergence weed control (unless you plan on reseeding in the spring). It is best if the nitrogen is NOT in slow-release form. Apply at the rate of 1 pound of actual nitrogen per 1000 square feet.

How long does annual bluegrass last? ›

Annual bluegrass flowers over several months in spring and produces a seed that may remain dormant in the soil for years before germinating. Annual bluegrass often dies from summer stresses but may survive in protected sites that receive irrigation.

How often should you fertilize bluegrass? ›

Wait until the lawn is actively growing, and fertilize every 6 to 8 weeks during the growing season, or when the lawn is looking yellow, growing slowly, and becoming susceptible to weeds such as clover.

Can you keep annuals alive forever? ›

But the species that are "true annuals" can't be overwintered using either of these methods, as they are genetically programmed to flower and die in a single growing season. If you try to bring such a potted plant indoors, it will simply turn brown and die as it completes its lifecycle.

Do you have to dig up annuals every year? ›

Simply put, annual plants die in the winter season so you must replant them every year, while perennials come back every year so you only plant them once.

Should you water annuals every day? ›


Many annuals need water every day, especially if they are in the sun. Don't wait for your annuals to wilt before you water. Instead, look for signs such as loss of gloss on leaves — or simply stick your finger into the soil. Most annuals like soil slightly and evenly moist 2 or 3 inches down.

What grass will choke out crabgrass? ›

Zoysia is a slow-growing grass that can take several years to become established unless it is installed as sod. It prefers full sun and well-draining soil and, once established, can choke out crabgrass and other weeds.

Does bluegrass stay green in winter? ›

More Resilient in Winter Months

While other grasses may turn brown and go dormant in the winter, bluegrass will stay green and keep growing, meaning your lawn will look better throughout the entire year. In addition, bluegrass is less likely to suffer from disease and pests than other types of grass.

Will bluegrass choke out quackgrass? ›

Unfortunately there is not an herbicide that would kill the quackgrass without damage cool season turf, such as Kentucky Bluegrass.

What kills poa annua and crabgrass? ›

Applying a pre-emergent herbicide is the most effective way to control poa annua and many other annual weeds. Pre-emergent creates a barrier BELOW the surface so sprouting seeds cannot push their way up.

Does poa annua go away? ›

Once temperatures heat up in the summer, Poa annua dies off in warm-season turfgrasses, leaving behind unsightly brown voids.

How can poa annua be prevented? ›

The best way to prevent poa annua is by applying a pre-emergent herbicide before the seeds germinate. Since poa annua germinates in the early fall when soil temperatures drop below 70 degrees, apply a pre-emergent in the fall before the first frost and before the soil temperature reach below 70 degrees.

Can you choke out poa annua? ›

Proper lawn care maintenance that addresses soil compaction, drainage issues and nitrogen rates will be important to keep your turf strong and choke out Poa Annua.

What are the disadvantages of poa annua? ›

Poa annua's disadvantages are: Its seed head production for several weeks in late spring has an objectionable appearance and makes the putting surface bumpy. Its aggressive growth in the spring crowds out the Bentgrass. It also out competes Bentgrass in shady and wet conditions.

What kills poa annua post emergent? ›

Katana® Turf Herbicide (active ingredient flazasulfuron) is a sulfonylurea, ALS-inhibiting (Group 2) herbicide for selective Poa annua control. It is highly effective for post-emergent control with the addition of residual control during cooler weather.

Should I plant fescue or bluegrass? ›

Tall Fescue is a bunch-forming grass that doesn't spread or repair itself in the landscape. Kentucky Bluegrass requires more sunlight, fertilizer, and water than Turf Type Tall Fescue. It's less resilient to heavy foot traffic, but is capable of repairing any damage it sustains from heavy traffic or pesky dogs.

Will Kentucky bluegrass spread to fill in bare spots? ›

If your lawn is Kentucky bluegrass or Bermuda grass — two of the most common in the northern and southern U.S., respectively — you may be in luck: The grass should spread to fill bare spots, Churchill says. Those grasses have runners, meaning vine-like stolons above ground and stem-like rhizomes below ground.

Should you let Kentucky bluegrass go to seed? ›

Allowing Grass to Seed Thins Lawn and Wastes Nutrients

Most lawn grasses, such as Kentucky Bluegrass and Bermudagrass, grow and spread through the use of specialized roots and stems known as rhizomes and stolens. This spreading attribute is what helps your lawn repair itself after damage and fill in bare spots.

How do you get rid of poa annua grass from your lawn? ›

Most people choose to control poa annua with a pre-emergent herbicide. This is a herbicide that will prevent the poa annua seeds from germinating. For effective poa annua control, apply a pre-emergent herbicide in early fall and again in early spring. This will keep the poa annua seeds from sprouting.

Why do golf courses use poa annua? ›

Poa annua is more tolerant of low-light environments and is more traffic tolerant than creeping bentgrass. Given certain circumstances, Poa annua can just make sense. At some facilities with Poa annua putting greens, this turfgrass is simply the preference of golfers or those holding leadership positions.

What month does poa annua germinate? ›

Poa annua Biology

Poa annua is a winter annual that germinates in the late summer/early fall once soil temperatures fall below 70o F. Seedlings mature in the fall, overwinter in a vegetative state, and flower and produce seed in late spring and early summer.

What is the life cycle of annual bluegrass? ›

The answer to that lies in its life cycle. It is a technically a winter annual, which means that it germinates late in the summer and into the fall, lives through the winter as a mature plant, and in the spring it produces a seed crop and simply dies.

How often should bluegrass be watered? ›

Soil preparation is critical to the rooting depth and drought tolerance of turf. Kentucky bluegrass lawns may require 2.5 inches of water or more per week during the heat of summer. The best time of day to irrigate is between 10 p.m. and 6 a.m. grown on clay soil.

Why is my bluegrass turning brown? ›

Kentucky bluegrass can start turning brown after about 7 days without water. This browning appearance is the grass going into dormancy in order to survive the drought. Some leaf tissue will die, but the base and roots of the grass are still alive and will green up when water returns.

What is the best fertilizer for blue grass? ›

Use high-nitrogen, low-phosphorus fertilizer like 18-0-4 that includes a pre-emergence weed control (unless you plan on reseeding in the spring). It is best if the nitrogen is NOT in slow-release form. Apply at the rate of 1 pound of actual nitrogen per 1000 square feet.

What is the 1 2 3 2 1 lawn watering technique? ›

1-2-3-2-1 watering technique:

In April water 1 day/week. In May ramp up to 2 times/week. In the heat of the summer water 3 times/week. In September drop back to 2 times/week. In the fall drop back down to 1/week.

How do you green up Kentucky bluegrass? ›

Applying 1/8 pounds per 1,000 of Ammonium Sulfate with warmer temperatures will help wake the turf up and start the green-up process. Jointly applying Ammonium Sulfate with a slow-release fertilizer such as a 46-0-0 fertilizer, gives the turf a steady spoon-feeding.

Should I bother watering brown grass? ›

It's natural for grass to go dormant to conserve water during periods of limited rainfall, and drought-induced brown grass should turn green on its own as the weather cools and rainfall increases. You can also restore your lawn by giving it an inch of water on a weekly basis with your lawn sprinkler.

Does overwatering turn grass brown? ›

Many customers equate a brown spot in their lawn as the lawn needing more water, when actually the opposite is what is often required. Too much water saturates the soil, filling up all the air space between the soil particles with water.

Does bluegrass repair itself? ›

Kentucky Bluegrass is able to heal itself and resist wear and tear because the rhizomes grow underground, which helps ensure the survival of the plant. Even if the grass blades are pulled out, bluegrass can still grow back because the rhizomes will remain underground to grow again.

Can you overseed bluegrass? ›

It is as important to prepare the area of your bluegrass lawn for overseeding as it is for planting. Pull out any weeds, get rid of thatch, aerate the soil, and fertilize if necessary. Give the Kentucky bluegrass seeds the best possible opportunity to germinate, grow, and fill out your yard.


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