Using Vinegar to Kill Weeds: Basic Guide

White vinegar is commonly used for cleaning and cooking. Its acetic acid can also help kill or control many weeds.

Regular household vinegar (5% acetic acid) works on young, small weeds. However, vinegar with a higher acetic acid content usually works better, especially on larger or tougher weeds.

Yes, vinegar can kill many young weeds by burning their leaves and stems. But household vinegar does not usually kill deep roots, so some weeds may grow back. Stronger horticultural vinegar works better but must be handled carefully.

Killing Weeds Naturally with Vinegar

Vinegar can be an effective way to control many weeds, especially on warm, sunny days.

It is an affordable option and is often considered a lower-risk choice than some synthetic herbicides when used correctly. However, stronger vinegar products can still be dangerous if mishandled.

To make your homemade weed killer, you only need two simple ingredients and a sprayer to apply the solution.

A pump sprayer with an extended nozzle and hose is best for large areas, while a hand sprayer or paintbrush is best for small areas. Paintbrushes will also prevent you from accidentally killing your grass.

Combine 1 gallon of white vinegar with about 1 tablespoon of liquid dish soap. The soap helps the mixture stick to weed leaves.

Shake well, then spray the solution onto the weeds.

How often you apply it depends on how resistant the weeds are to the vinegar solution. Apply the solution and look for signs of wilting or browning within a day. Larger weeds may take longer.

If it requires a second application, do so and check back in 24 hours. Mature weeds may require repeated applications. Some perennial weeds may regrow because vinegar does not always kill the entire root system.

Type of Vinegar

Household white vinegar typically contains about 5% acetic acid, though some products range from 4–7%. Horticultural vinegar products are much stronger and may contain 10–30% acetic acid.

Horticultural vinegar is generally a better choice for mature weeds that are harder to kill.

However, because of its higher acidity, handle horticultural vinegar carefully and keep it away from your eyes and skin.

When to Use

Apply the solution before annual weeds, such as crabgrass, go to seed. Success is easier with young plants than with older, mature ones.

Horticultural vinegar is generally more effective on mature weeds. It may provide better control of some perennial weeds than household vinegar.

Thoroughly coat the leaves and stems of the weed for the best results. Apply the solution on a warm, sunny, calm day to improve its effectiveness and reduce spray drift.

Vinegar and Salt

Some gardeners mix vinegar and salt to kill weeds. However, this method is not recommended because salt can build up in the soil and prevent desirable plants from growing.

If you need stronger weed control, horticultural vinegar is usually a better option.

How Long Does It Take to Work?

Visible wilting and browning often begin within 24 hours. Larger weeds may take several days to die back completely.

If used correctly, vinegar weed killer can effectively suppress many weeds and help keep them under control.

Just use it at the right time and in the right amount. As mentioned, you may need to use this home remedy more than once to see the results.

However, please note that it is non-selective. It will burn the leaves of any plant it touches, including your vegetables, fruit trees, grass, and flowers, so be careful when applying it.

How Long Does Vinegar Last in the Soil?

Vinegar usually does not remain in soil for long. Rain, watering, and naturally occurring soil microorganisms help dilute and break it down.

Does Vinegar Kill Weeds to the Root?

Household vinegar usually kills only the above-ground portions of weeds. Young annual weeds may die completely. However, established perennial weeds often regrow from their roots.

This regrowth often requires repeated treatments or other control methods to manage effectively.

Horticultural vinegar may damage weeds more severely, but even strong vinegar may not completely kill deep roots.

Cost-Effectiveness

Vinegar weed killer is often less expensive than many commercial herbicides. However, large weed problems may require several applications, which can increase the cost and effort.

When used at the right time, vinegar can be an effective natural weed-control method for vegetable gardens. It also works well on weeds growing in cracks, between pavers, and in walkways and driveways.

Precautions

Horticultural vinegar is used as a natural herbicide because of its high acidity. However, it can still cause injury if not handled properly.

It can damage desirable plants and may irritate the eyes, skin, nose, and throat of people and animals.

Wear gloves and safety goggles when using vinegar as a weed killer. If using strong horticultural vinegar, follow the product label and take extra precautions.

Does vinegar kill weeds permanently?

Household vinegar usually does not kill weeds permanently because it often burns only the leaves and stems. Many perennial weeds grow back from their roots.

Stronger horticultural vinegar may provide better control, but repeated treatments are often needed.

Takeaway

Vinegar is a useful home remedy for controlling many common weeds, including creeping buttercup. However, repeated treatments may be needed.

It is one of the most popular natural weed-control options, especially for young weeds and weeds growing in cracks, walkways, and other hard surfaces.

If you don’t want to bother with these DIY concoctions, you can choose Phydura as an alternative. This product contains vinegar and other naturally derived ingredients. It works as a contact weed killer, burning weed leaves and stems on contact.