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Crabgrass Prevention Schedule for Southern Areas

February 2, 2014

As much as I hate to, I’m going to bring up an ugly subject… crabgrass.

Since many of you experienced heavy rains last year, your crabgrass really multiplied.  The seeds those plants left behind practically everywhere are raring to grow.  Tens of thousands of tiny crabgrass seeds could be lurking in your lawn, right now getting ready to take over.  The good news is you can stop them from growing by putting down a Scotts Halts barrier that prevents them from geminating.

Crabgrass Seedlings about a week after germination

Crabgrass Seedlings about a week after germination

The big question:  When to apply?  Experts say crabgrass germination starts when your soil temperature reaches 55 degrees for several days.  Here is a link to a soil temperature tracking map that provides you up to date soil temps for your area. You can also look at a 5-day projection of soil temps for your geography by using the pull-down menu at that web site.  It is better to get your preventer down too early than too late.

Here are some timing guidelines for those of you living in areas where it is important to spread your preventer over the next several weeks:

For Florida:  Apply by Mid-February.   If you have dormant (brown-looking) Bermudagrass, Zoysia or Centipede grass you should use Scotts HALTS without the Turf Builder.  If you have St. Augustinegrass you should use Scotts Halts if you plan to feed your lawn with Scotts Bonus S Weed and Feed.

For other Mid-South States:  Apply by March 1.  If you have dormant (brown-looking) Bermudagrass, Zoysia or Centipede grass you should use Scotts HALTS without the Turf Builder.  If you have Fescue, use Scotts Turf Builder with Halts. 

For Texas:  Apply by March 1 in South Texas, by March 15 in rest of the state.  If you have dormant (brown-looking) Bermudagrass, Zoysia or Centipede grass you should use Scotts HALTS without the Turf Builder.  If you have St. Augustinegrass you should use Scotts Halts if you plan to feed your lawn with Scotts Bonus S Weed and Feed.

For California:  Apply by March 1 in Southern California and by March 15 in Northern California.  Use Scotts Turf Builder with Halts. 

If you have lawn questions here is a link to contact our Scotts Help Center.

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2 Comments
  1. adrian permalink

    Hello Ashton,

    I live in the DFW area and weather is the definition of bipolar. Friday was a high 80 degrees and sunny. I sprayed Ortho Nutsedge (I believe that’s what it’s called) and today is a high of 22 with wind gusts feeling like 10 degrees. Friday is forecasted to be 70 again. Will I have to spray again before I fertilize for spring?
    Thanks for all the advise as you have been a grear help these past few years.

    • Hi Adrian
      The weeds are controlled by absorbing the ingredients when growing. When you get those kinds of temp shifts you can get start/stop growth. You will be able to tell in a week or so if the weeds are starting to die out. You may need to treat again.

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