Baking Soda on Crabgrass

granburyflowergirl(7)June 18, 2010

I have tons of crabgrass in my P-77 Bermuda lawn.

I read that dusting crabgrass with baking soda is an effective way to kill crabgrass without hurting the lawn, somewhere I read that someone mixed the baking soda with hot water and sprayed it on the grass rather than "dusting" the powder, this would seem like the easiest way to go, can anyone confirm that this method works?

If not, could you just water the lawn so its all wet, then sprinkle baking soda over everything with a hand spreader or flour sifter?

How often would you need to repeat this to keep the crabgrass away and will this negatively affect the microherd?

Thanks!

Nikki

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sunfire01(z8 TX)

I just finished treating my bermuda with baking soda for the crabgrass and YES it works well. It did brown my bermuda a little but that will recover easy. The trick is you need to mix a couple of teaspoons of soap in with the water to get the water to stick to the crabgrass leaves. I also added some molasses to it as well. Spray the crabgrass then take some pantyhose and fill it with the baking soda. Tap the pantyhose over the crabgrass to dust the leaves. It doesn't take much. It turns the leaves black within a day or two. Have fun and get rid of that crabgrass before it seeds.

    Bookmark   June 18, 2010 at 7:43PM
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ontheway

will this do anything for tall fescue?

    Bookmark   June 18, 2010 at 9:50PM
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Kimmsr(4a/5b-MI)

I have found a lot of anecdoatal information that does indicate that Baking Soda, "Sodium Bicarcobonate" will at least stop the current growth of crab grass. One web site sells a product that contains "Baking Soda" although that is listed as an inert ingrediant and supposedly cinnamon is what kills off the crab grass. Another "authority" is concerned that this "Sodium Bicarbonate" will so change you soils pH as to cause more problems then the crab grass. However it would take several hundred pounds of Baking Soda to do that so that point (this person had, as I recall, a product to sell) may be invalid.
Try some Baking Soda on some crab grass and some cinnamon on some different asn see which does what, and which is the less expensive if they both do the same.

    Bookmark   June 19, 2010 at 7:48AM
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west9491(6)

ill try this in my garden rows, but will it kill other grasses in the lawn? it sounds.....selective???

    Bookmark   June 19, 2010 at 9:52AM
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sunfire01(z8 TX)

It weakened my bermuda grass but did not kill it. I did try cinnamon alone and it did nothing to the crabgrass. Only the baking soda made an impact on it.

    Bookmark   June 19, 2010 at 9:53PM
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west9491(6)

so what's the formula to use and how to apply?

    Bookmark   June 19, 2010 at 10:38PM
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granburyflowergirl(7)

Can anyone confirm that it works to mix the baking soda with hot water and spray it on rather than sprinkling dry powder on the wet blades?
Thanks

    Bookmark   June 20, 2010 at 9:08AM
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sunfire01(z8 TX)

I don't think mixing the baking soda in water and spraying it will work since the water solution would just run down the leaves into the soil. But maybe I'm wrong and if this does work it would be interesting. I think I will experiment and try it out and I'll let you know.

    Bookmark   June 20, 2010 at 9:27AM
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west9491(6)

even if you used soap to make it stick to the plant better?

    Bookmark   June 20, 2010 at 10:20AM
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granburyflowergirl(7)

Kimmsr, thanks for the info, sounds like I'm okay as I dont plan to use 100's of lbs of it!

Sunfire, I think west had a good idea adding soap...Please post your experiment results here, I'm right behind you!

    Bookmark   June 21, 2010 at 7:40AM
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bpgreen(5UT)

"will this do anything for tall fescue?"

It'll probably kill it. But it'll also kill a lot of other grasses. Are you trying to kill the fescue or kill crabgrass in fescue?

    Bookmark   June 21, 2010 at 11:29PM
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Kimmsr(4a/5b-MI)

Everything I have seen about this says that the Baking Soda was applied to the crab grass as a powder, not sprayed on after being mixed in water. Mixing in water might dillute the Baking Soda too much, but you would still need to pour it directly on each plant and could not apply this with a bigger sprayer. Mixing Baking Soda with water to apply it would involve much more time and energy than just sprinkling some powder on each plant.

    Bookmark   June 22, 2010 at 7:33AM
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granburyflowergirl(7)

I don't know... it took me quite a long time to hand spray water & soap on each plant with the squirt bottle, then thump the pantyhose with powder to cover each plant.

Even the slightest breeze carried most of the powder away from its intended target making it very frustrating for me. I may eat my words after I go back today to assess the impact - if it worked it will certainly have been worth it.

    Bookmark   June 22, 2010 at 9:46AM
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sunfire01(z8 TX)

Well I am back with the results of my experiment using baking soda mixed in with water and soap. The conclusion is that it does not work. As Kimmsr stated I think it dilutes the baking soda too much. But dry dusting works like a charm.

    Bookmark   June 22, 2010 at 10:36AM
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ontheway

"It'll probably kill it. But it'll also kill a lot of other grasses. Are you trying to kill the fescue or kill crabgrass in fescue?"

Trying to kill the crabgras in fescue. Sorry.

Not to hijackthe thread but what to do with some bermuda in fescue as well?

    Bookmark   June 22, 2010 at 4:02PM
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granburyflowergirl(7)

2 days after applying the baking soda and it appears that my Bermuda is hurting a lot more than the crabgrass :-(

Maybe what I thought was crabgrass is something else?
day 1


day 3

    Bookmark   June 22, 2010 at 7:01PM
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sunfire01(z8 TX)

No its crabgrass it just takes more than one application to get the fully mature ones. Don't worry about the bermuda, it will bounce back.

    Bookmark   June 22, 2010 at 10:38PM
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bpgreen(5UT)

"Trying to kill the crabgras in fescue. Sorry.

Not to hijackthe thread but what to do with some bermuda in fescue as well?"

I think baking soda will kill fescue, too. I wouldn't try it.

If you have Bermuda in your fescue, you can hit it repeatedly with glyphosate when it's green and growing. That will kill any fescue around it, but it will eventually kill the Bermuda. But it will take repeated applications.

Or, you can wait until winter when the fescue is green and the Bermuda is brown and spray all the green grass with glyphosate. The Bermuda will then fill in once it starts to grow.

    Bookmark   June 22, 2010 at 10:53PM
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Kimmsr(4a/5b-MI)

Crab Grass is an annual, if you kill the plant now (before seeds develop and spread around) you will have fewer plants next year. The Bermuda, as well as the Fescues, are perennial and eventually new grass will grow into the spots where the Crab Grass was killed off.
Kill the Crab Grass off, and maybe some surrounding grass, and once that is done cover the area with some compost to encourage grass to grow back quicker.

    Bookmark   June 25, 2010 at 8:44AM
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simmon_v_bellsouth_net

how long do you have to wait before putting new sod r seed where you killed crab grass with BS

    Bookmark   June 16, 2011 at 11:50AM
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Kimmsr(4a/5b-MI)

Keep in mind that using any glyphosate product is anathema to an organic gardener. Why someone would come to an organic lawn care forum and suggest using a product that no organic gardener would use is beyond me.

    Bookmark   June 17, 2011 at 8:07AM
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bpgreen(5UT)

I admit that glyphosate isn't organic, but I probably forgot that I was on the organic forum when I posted that. However, I doubt if you'll kill Bermuda with any organic approach.

I'm not really sure why I did post that, since I posted italmost exactly a year ago and I'm equally mystified why, if it's that horrible to mention, somebody would wait a year to react.

    Bookmark   June 17, 2011 at 3:30PM
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solc

Here's a good link on using baking soda for crabgrass and dalligrass. Too bad you dont have St. Augustine because it seems to hardly impact it. The bermuda is indeed damaged.

http://www.youtube.com/watch?v=fJLN9BmRJ2o

    Bookmark   June 17, 2011 at 10:32PM
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jparker5521_live_com

I will have to try this BS formula, but my question I can't find any answers to is, "what's this black(mold like) powder that is only forming on the bloom(?) part of the crabgrass stem?"
It plasters your feet and ankles when you walk through it and leaves outlines of your feet on the carpet.
This is not oily like all other threads talk about, it only forms on what I would think is the seed heads of the plant.
It is crabgrass, it is extremely invasive, it is not causing irritation to skin but it is extremely hard to get rid of.
I have tried chemicals that state they are for crabgrass prevention and crabgrass killer but they seem to just make it spread, stronger and laugh at me!

Please if you don't know, don't give me any, "I think" answers, I've already spent $1000's on lawn products and can't afford more run arounds!
Thanks for any educated help.
John-

    Bookmark   August 3, 2011 at 5:58PM
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Kimmsr(4a/5b-MI)

What I have seen over the years is that anything strong enough to kill Crab Grass will kill any other grass including Quack Grass. Baking Soda, dusted on Crab Grass (not mixed in water and sprayed), will kill that Crab Grass as well as any other type of grass also dusted.

    Bookmark   August 4, 2011 at 7:22AM
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jparker5521_live_com

I'm ok will killing my complete lawn at this point.

But does anyone know about the black dust I'm talking about? It doesn't seem to be a mold and more like a pollen because it's only when the crabgrass is in bloom*?

    Bookmark   August 5, 2011 at 12:28PM
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qserenali

I dusted baking soda on crabgrass last night and unfortunately it starts to rain around lunch time today. Will the baking soda still be able to kill crabgrass? Thanks.

    Bookmark   July 28, 2013 at 1:27PM
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