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Vinegar as herbicide #787749

Asked April 23, 2022, 3:02 PM EDT

Do you recommend using vinegar as an herbicide? Is 5% acidic vinegar or does it makes sense to use higher acidic content? Does mixing salt in make if my more effective? I’d like to use this to kill small weeds that grow between pavers on my patio.

New Castle County Delaware

Expert Response

Thank you for your question.   Vinegar will only kill what is exposed on the surface.  It will not kill the roots of the plant it is applied to.   Household vinegar is 5% and will kill small, newly emerged weeds.   There are other products available, but be very cautious of the 20% vinegar products.  The warning label on these products is  DANGER.  
Vinegar solutions of 11-percent or greater strength can cause skin burns and eye injury. Always read and follow all pesticide label directions.

Here are two fact sheets that will have good information for your question. 
https://extension.umd.edu/resource/vinegar-alternative-glyphosate

http://hyg.ipm.illinois.edu/pastpest/200714f.html
Best regards,
Tracy

An Ask Extension Expert Replied May 06, 2022, 2:07 PM EDT
Thanks very much for your response Tracy!

Sent from my iPhone

On May 6, 2022, at 2:07 PM, Ask Extension <<personal data hidden>> wrote:


The Question Asker Replied May 06, 2022, 4:35 PM EDT
Your Welcome.
An Ask Extension Expert Replied May 10, 2022, 5:29 PM EDT

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