Is the vinegar/salt/dawn solution weed killer effective on buckthorn?
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Hi KTU,
You can use 1 gal white vinegar, 1 cup salt and about 1 TBSP of Dawn to make a fairly potent weedkiller. However, you should know that buckthorn has a high tolerance for salt. I'd try doubling the salt however, most of the recommendations are to use a chemical. :( Wishing you the best.
Another great DIY week killer recipe with salt and white vinegar can be found here: https://www.hometalk.com/diy/outdoor/pest-repeller/diy-weed-killer-44672575