Ask a Question forum→Getting rid of horse herb

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Name: Sue
Bexar County, South Texas
Region: Texas Container Gardener Herbs Butterflies Dragonflies Bee Lover
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Never_Ending_Quest
Sep 13, 2021 1:28 PM CST
I know many people sing the praises of horse herb, and our local garden nurseries even sell it. But, it is driving me crazy taking over flower beds and even my well established lawn! I immediately get rid of flowers that it develops but I think it spreads underground...and therein is the problem.

Does anyone know how to get rid of it in a St. Augustine lawn without killing the lawn?

It's to bad that it is so invasive, otherwise I'd leave it in flowerbeds because it does attract pollinators.
On a Never Ending Quest: First to learn...then to teach.
Name: stone
near Macon Georgia (USA) (Zone 8a)
Plant Identifier Garden Sages Million Pollinator Garden Challenge
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stone
Sep 14, 2021 6:21 AM CST
What a neat looking plant!
Looks similar to melampodium...

Send me some...

California (Zone 9b)
CalPolygardener
Sep 14, 2021 7:36 AM CST
Look for a product with Atrazine. It works as both a pre-emergent and selective post-emergent control. For an organic solution, you're stuck with fingers or a lot of vinegar.
Name: Sue
Bexar County, South Texas
Region: Texas Container Gardener Herbs Butterflies Dragonflies Bee Lover
Moon Gardener Organic Gardener Ferns
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Never_Ending_Quest
Sep 18, 2021 12:35 AM CST
@CalPolygardener Thank You!
Thank you for the suggestion. I just ordered some Atrazine. I'll report back about how it works!
On a Never Ending Quest: First to learn...then to teach.
Name: Sue
Bexar County, South Texas
Region: Texas Container Gardener Herbs Butterflies Dragonflies Bee Lover
Moon Gardener Organic Gardener Ferns
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Never_Ending_Quest
Sep 22, 2021 6:17 PM CST
@CalPolygardener The Alatrazine arrive yesterday. The label does not mention horse herb as one of the controlled weeds. Have you used this on horse herb before?
On a Never Ending Quest: First to learn...then to teach.
Name: Porkpal
Richmond, TX
Charter ATP Member Dog Lover Cat Lover Keeper of Poultry Keeps Horses I was one of the first 300 contributors to the plant database!
Garden Ideas: Level 2 Plant Identifier Raises cows Roses Farmer Celebrating Gardening: 2015
porkpal
Sep 22, 2021 6:25 PM CST
Any broadleaf herbicide should work. I think 2,4-D would be safer. Follow the directions on the label and your lawn should be unharmed. Horse herb (also called prostrate ground flower) is often suggested as a grass substitute where saving water is important. It also grows in areas too shady for most grass. BUT it is quite aggressive.
Porkpal
Name: Sue
Bexar County, South Texas
Region: Texas Container Gardener Herbs Butterflies Dragonflies Bee Lover
Moon Gardener Organic Gardener Ferns
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Never_Ending_Quest
Sep 22, 2021 6:37 PM CST
Thank you @porkpal! I am trying to get rid of the horse herb that is moving into my St. Augustine lawn. I've used Natria herbicide on areas that I am not concerned about protecting (no lawn, no flower or shrub areas). As mentioned, I've had a bit of success with Weed B Gone, but the horse herb spreads underground, so I really need to get it under control.

Lot's of people do love it as a lawn substitute, and if it was not so invasive, I would leave it in a couple of areas that don't have lawn. Thanks again!
On a Never Ending Quest: First to learn...then to teach.
California (Zone 9b)
CalPolygardener
Sep 23, 2021 10:14 AM CST
What brand of Atrazine do you have? I haven't used it myself, but it's the answer I get when looking for a control. The label may say something like "broadleaf weeds in St Augustine grass" without listing it specifically. The other reason its recommended for is weed prevention in St Augustine.
Name: Porkpal
Richmond, TX
Charter ATP Member Dog Lover Cat Lover Keeper of Poultry Keeps Horses I was one of the first 300 contributors to the plant database!
Garden Ideas: Level 2 Plant Identifier Raises cows Roses Farmer Celebrating Gardening: 2015
porkpal
Sep 23, 2021 11:02 AM CST
I've heard it can kill your shrubs too... I've never used it.
Porkpal
Name: Sue
Bexar County, South Texas
Region: Texas Container Gardener Herbs Butterflies Dragonflies Bee Lover
Moon Gardener Organic Gardener Ferns
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Never_Ending_Quest
Sep 23, 2021 12:48 PM CST
I bought the actual brand name Altrazine manufactured by Southern Ag. Yes, it will kill shrubs and flowers too. I agree
I would only use it on the lawn, and try to control the flower beds some other way. I just called the manufacturer and they do not know if it will kill horse herb or not. Shrug! My primary concern is keeping it from taking over my St. Augustine lawn, which is otherwise very thick and lush. Horse herb spreads underground so it makes it difficult to fight. Thinking

Very frustrating! When I moved in, I was bombarded with Thistle. Eliminated that, even though my next door neighbor still lets it grow everywhere. Thumbs down The following year Oxalis invaded. Got rid of that too! Last year when I saw the first horse herb plants emerging, I thought it was Oxalis returning. But it wasn't and the horse herb is worse and exacerbated by so many people growing it as ground cover. Grumbling
On a Never Ending Quest: First to learn...then to teach.
California (Zone 9b)
CalPolygardener
Sep 23, 2021 3:25 PM CST
It has the "many other broadleaf weeds" statement to cover their butts. It is the recommended product for control from multiple sources.
Name: Sue
Bexar County, South Texas
Region: Texas Container Gardener Herbs Butterflies Dragonflies Bee Lover
Moon Gardener Organic Gardener Ferns
Image
Never_Ending_Quest
Oct 4, 2021 5:10 PM CST
It's finally getting cool enough to use the Altrazine. Hurray! I'll update when I have results to share!
On a Never Ending Quest: First to learn...then to teach.

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