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Poa Annua (Annual Bluegrass) in Your Lawn Now – Set Your Calendar to Prevent

February 18, 2015

This is a reminder for all of you who are seeing this weed (see photo) in your lawn now in late winter/early spring.  Circle early September on your calendar as the time to put down a preventer to keep Poa Annua from growing in your lawn next year.

This is an early spring picture of Poa Annua in a Bermudagrass lawn.  Notice the light colored seeds.

This is an early spring picture of Poa Annua in a Bermudagrass lawn. Notice the light colored seeds.

Lawn weeds like Poa Annua (Annual Bluegrass), Common Chickweed, and Henbit are “winter annuals”.   This means they germinate in fall, thrive in spring and then die during summer, but not before scattering seed so the cycle can start all over again in fall.  (“summer annuals”, like Crabgrass, Foxtail and Barnyardgrass, have the opposite cycle of germinating in spring, thriving in summer and dying just prior to winter, but not before scattering seed so the cycle can start all over again in spring.)

So if you vow now that you want to stop these winter annual weeds from invading your lawn, you need to pick up a bag Scotts Halts or Scotts Turf Builder with Halts so you can treat your lawn around Labor Day.  (This is the right product to use even though it says prevents crabgrass.  Apply it in early spring to prevent crabgrass and other summer annuals.  Apply it in early fall to prevent Poa Annua and other winter annuals.)

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4 Comments
  1. Angela S. permalink

    I read frequently but never comment. Your tips are extremely helpful! I was just wondering yesterday what this weed was popping up in my lawn and those in my neighborhood. Perfect timing with this article. I just applied Scotts Turf Builder with Halts last weekend to prevent crabgrass. Marking my calendar for September to do another application. Thanks!

    • Hi Angela S.
      Glad you found this posting helpful. You will likely find that it may take several years of preventing Poa Annua to get it under control. This is a tough weed with many seeds. In some areas some of the plants are able to live thru summer so it sometimes is not a true annual… more like a weak perennial.

  2. Leonard Leone permalink

    LIVE IN REVERE BEACH,MA OVER 7 FEET OF SNOW

    • Hi Leonard Leone
      WOW… I feel your pain a little bit. I am in Columbus OH this weekend speaking at the Home & Garden Show and snow is falling at a good clip. One thought, this is the kind of weather when your lawn looks as good as your neighbors. Think Spring!

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