Why Your GA Lawn Needs Fall Pre-Emergent Weed Control

By October 9, 2017Lawn Care

Now that the weather is finally cooling down, it’s time to apply pre-emergent weed control to your lawn.


Because winter weeds, especially Poa annua, will invade your lawn this winter if you don’t take any precautions.

In this blog post, you’ll learn about Poa annua, how pre-emergent weed control helps to stop the weed from invading your lawn and what you can do to as a homeowner to stop the spread of annual bluegrass weeds.

What is Poa Annua?

Poa annua is a weed that’s related to the cool season grass, Kentucky bluegrass. This cool-season weed infests GA lawns throughout the fall and winter months.

During the winter, it’ll spread via seed and take over your lawn unless you take the appropriate measures to stop it. However,  turfgrass scientists at Clemson University say that homeowners can’t expect to eradicate the weed from their yards.

But you can slow down its spread and keep it from taking over your lawn.

It’s not too late to protect your family from mosquitoes. Learn more in this blog post.

What GA Homeowners Can Do to Stop the Spread of Annual Bluegrass Weeds

Your first defense again Poa annua starts with how you care for your lawn. For example, do you give your lawn a once-a-week soak or do you do a daily sprinkle?

Ideally, you should give your lawn a weekly soak rather than a daily sprinkle. Your lawn grass develops deep root systems when the water percolates deep down into the soil.

How you cut your lawn grass also affects your property’s susceptibility to annual bluegrass weeds. You should only take the top third off of the grass blade.

In the fall, with the cooler temperatures, you can raise your mower blades to the highest setting. It’s a good practice to allow your grass to grow a little taller so it can protect itself from disease and insects.

Do you feed your lawn? If you hire a professional lawn care company to fertilize and add weed control to your lawn, all the better.

Your lawn service has better quality fertilizers, knows the best time to feed your lawn and is specifically trained in the health and well-being of lawns.

Plus, lawn fertilizer feeds the grass, so it grows thick and healthy—crowding out weeds including Poa annua.

Other lawn services to benefit your property include core aeration, de-thatching, and overseeding.

Read more about core aeration in this blog post.

Pre-emergent Control for Winter Weeds

Once you established smart lawn care practices, the second layer of defense against Poa annua comes in the form of pre-emergent weed control.

The pre-emergent acts as a barrier between the soil and the seed, and prevents grassy weeds from germinating and infesting your lawn.

If you still notice annual bluegrass growing in your lawn, your professional lawn service will apply post-emergent, killing existing weeds.

At Agropro, we apply pre-emergent weed control for annual bluegrass weeds, as well as other winter weeds, in the fall where there are at least four days in a row at 75°F. Typically, we start pre-emergents in August through November.

These treatments prevent and maintain control of Poa annua and other invasive weeds throughout the fall and winter months. Our weed control program consists of both pre- and post-emergent weed controls.

When we apply our weed control to your property, we also apply a root zone fertilizer to promote a healthy root system.

Do you want to protect your lawn from Poa annua and other winter, grassy weeds? Then call us today at 678-445-9990 or fill out our contact form to make your appointment.


Davenport, Millie, “Annual Bluegrass Control,” Clemson Cooperative Extension: May 2010.

Agropro Lawn Care Service~ Agropro provides Lawn Care and Plant Health Care services to these areas in North Georgia: Alpharetta, Atlanta, Buckhead, Canton, Cumming, Dunwoody, Johns Creek, Marietta, Milton, Roswell, Sandy Springs, and Woodstock.