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The one homemade recipe Strenge has seen work in action: 1 gallon of vinegar (5% acetic acid) mixed with 1 cup salt and 1 tablespoon dish soap, with an emphasis on the salt making its low concentration effective. “Vinegar weed killers can work if used properly,” he said, “as long as users understand repeated sprays will be necessary, and that there are potential problems with using vinegar weed killers in their gardens.” The Home Recipes That Do WorkĮxperts including Strenge, however, will say kitchen vinegar recipes do work in some capacity, but only in some ways and with limits. Top Garden-Strength Vinegar ProductsĪs an Amazon Associate, LawnStarter earns from qualifying purchases.Īs such, this could indicate that household vinegars are even less reliable at killing weeds than what the above list depicts. These are much stronger than the grocery store-bought white or apple cider vinegars (containing only 5%). The above list applies only to “horticultural vinegar pesticides” (containing at least 20% acetic acid, the corrosive chemical that kills weeds).
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When you steer away from anecdotal evidence and look at more expert sources, you’ll find that vinegar’s virtues are very much a mixed bag. This can add to vinegar’s mystique, but also to its misleading hype. Organic gardening websites and homesteader blogs are prone to powerful personal testimonies of their own success with vinegar. Why the Evidence Isn’t Thereĭespite the abundance of how-to vinegar herbicide recipes online, there are no scientific tests or trials showing the veracity of how well kitchen vinegar works to kill weeds - and that’s only one red flag for would-be vinegar users. And some vinegar weed killers could even be dangerous. For one, it may not be the effective weed killer you had hoped for. Regardless, seemingly simple, safe, and “natural” vinegar weed killer recipes are popular with organic gardeners and sustainable-lawn lovers, or anyone else thirsty for environmentally friendly ways to save time pulling weeds.īut the science is in and experts have spoken: Using vinegar to kill weeds just isn’t worth it. “The repeated sprays of salt-containing recipes can lead to too much soil salt build-up, and recipes that use but leave out the salt are nowhere near as effective.”