Vinegar: A Garden Miracle! (2024)

I’ve been working with homemade garden remedies in one context or another for about 10 years now. As someone who has spent days searching for odd cures to garden problems I consider myself qualified to say that, of all of the remedies I’ve seen, vinegar seems to be the product with the most (supposed) uses. You can kill weeds with it, as well as plant diseases and insects. You can also use it as a fertilizer or even to acidify your soil. It’s amazing! But which of these uses are real and which are just someone flapping their jaws?

Vinegar as an herbicide: White vinegar which is about 5% acetic acid and does a nice job of burning the tops of plants, but not their roots – so a larger weed will live right through a spray even though it will look bad right after the spray. You can buy 20% acetic acid. It works faster, but it has essentially the same problem killing larger weeds that that 5% acetic acid does. Besides efficacy issues there are safety issues also. I’ve used 20% acetic acid and I think that this stuff is too dangerous for the average person. A little in the eyes could cause permanent injury. Just a little whiff of it is enough to make the nose start running (in other words it’s not good for mucous membranes).

Vinegar as a disease control: What a great idea! Spray something that kills plants onto your prized petunias to control disease! OK, when you use vinegar as a plant disease control you do use a lower concentration which shouldn’t hurt the plant. But vinegar has never proven to be particularly effective at controlling plant diseases.

Vinegar as a fertilizer: Nope, doesn’t work. Acetic acid only contains carbon hydrogen and oxygen – stuff the plant can get from the air. The other things that may be in vinegar could be good for a plant – but it seems an expensive method of applying an unknown amount of nutrition.

Vinegar as a soil acidifier: This is one that I’ve seen a lot – and so I tried it. In a nutshell, it just doesn’t work that well. It takes a lot of vinegar and the pH change is brief at best. Use something like sulfur instead.

So to summarize, despite a lot of recommendations, the only thing that vinegar has really proven to be good at is killing weeds – and then only if the weeds are young.

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Vinegar: A Garden Miracle! (2024)

FAQs

What happens when you use white vinegar in the garden? ›

Due to its burning effects, using vinegar in the garden has been touted as a cure-all for a number of garden afflictions, most notably weed control. The acetic acid of vinegar dissolves the cell membranes resulting in desiccation of tissues and death of the plant.

Is vinegar as good as Roundup? ›

Politics and everything else aside, Roundup works better than vinegar. If you're opposed to the use of Roundup or you want to use vinegar for other reasons, you can certainly do it, but just be aware that you're going to have to keep using it and keep using it and keep using it.

What insects hate white vinegar? ›

Vinegar is one of the best ingredients to make a pest control spray. Vinegar is one of the best ingredients to make a pest control spray. It is effective in repelling ants, mosquitoes, fruit flies, and many others. Creating a mix is quite simple and is considered safe for humans and pets.

What does baking soda do for your garden plants? ›

Spraying baking soda on the leaves makes the surface become less acidic and limits the ability of fungal spores to grow. To prepare this, mix 1 teaspoon baking soda and a few drops of liquid soap in 1 liter of water and spray the solution on the infected plants.

Can I spray vinegar in my vegetable garden? ›

You can use a diluted solution of vinegar to eliminate harmful insects in the garden, but avoid using full-strength vinegar so that you don't accidentally harm good garden plants. Create a solution of equal parts vinegar and water and spray it around problem areas in your yard.

Can I pour straight vinegar on weeds? ›

Vinegar could be a popular choice for organic gardeners and homeowners, but it is not a natural and safe option to kill weeds. We can have much better and natural alternatives to vinegar. There are a few weed killers that are both organic and chemical free.

How long does vinegar stay in soil? ›

Even though vinegar is an acid, it breaks down quickly in the soil and, therefore, is not likely to accumulate enough to affect soil pH for more than a few days. Vinegar causes a rapid burn to plant tissue of susceptible species, so unintended injury is quite likely without knowing more information.

What is the strongest vinegar for killing weeds? ›

Vinegar with a higher concentration of acetic acid tends to control weeds more effectively. Household vinegar is generally 5% acetic acid. Some herbicidal vinegar products are 20% or 30% acetic acid. In general, 20% or 30% acetic acid is more effective because it more completely kills young leaves and growing points.

Does white vinegar get rid of weeds? ›

A highly effective homemade weed killer can be made using white vinegar, salt, and washing up liquid. Both vinegar and salt are rich in acetic acid, which dries out and destroys plants. Washing up liquid acts as a surfactant, ensuring the solution penetrates the leaf pores instead of just sitting on top.

Is there anything that kills weeds permanently? ›

To kill weeds, some amateur gardeners recommend combining Epsom salt and Dawn dish soap. Together, these household items create a potent mixture, so only use it in places you wish to eliminate weeds, such as a patio or sidewalk permanently.

Does vinegar harm wildlife? ›

Will vinegar harm insects or other wildlife? It can kill ants, spiders, and mosquitos. Vinegar can be lethal to bees, so if you grow plants to attract pollinators to your garden, it's better not to use vinegar to kill weeds where they grow.

What insects are attracted to white vinegar? ›

Specifically, aphids and fruit flies love the scent of vinegar and will seek it out. You can use this to your advantage by creating traps. Mixing a quart of water, 12 ounces of vinegar, and a tablespoon of dish soap, you can create a mixture that will rid your garden of annoying, buzzing pests.

Can white vinegar be used as a pesticide? ›

Vinegar can sometimes be effective; however, using vinegar for pest control is generally a short-term effort to control pests since it is not effective as a long-term treatment against serious pest infestations and will not keep pests completely away from your property.

Is white vinegar toxic to the environment? ›

Vinegar breaks down easily in the environment without causing harm, making it a sustainable and eco-friendly choice for cleaning and other applications.

Is vinegar toxic to weeds? ›

The researchers found that 5- and 10-percent concentrations killed the weeds during their first two weeks of life. Older plants required higher concentrations of vinegar to kill them. At the higher concentrations, vinegar had an 85- to 100-percent kill rate at all growth stages.

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