DIY Weed Killer: A Simple Homemade Weed Killer Recipe That Works

1 day ago
6 min read

Learn how to make a simple homemade weed killer using salt, water, and dish soap, plus two easy salt-free alternatives using vinegar and dish soap or boiling water. Find out how these DIY weed killers work, where to use them safely, and which method may be best for tackling unwanted weeds around your home.

Keeping weeds under control doesn’t have to mean spending a lot of money on expensive store-bought products. This simple DIY weed killer uses just a few basic ingredients you may already have at home, making it an affordable and easy solution for tackling unwanted weeds. It’s a great alternative for those looking to reduce the use of harsh chemicals around their home, especially in areas where children and pets spend time. With a few simple steps, you can create a budget-friendly weed killer that helps keep sidewalks, driveways, patios, and other outdoor spaces looking neat.

Why I switched to DIY weed killer?

I decided to start using homemade weed killer instead of a chemical weed killer for a few important reasons. The biggest one is my grandchildren. They love playing in the yard, and I wanted a weed control option that would give me greater peace of mind around the areas where they spend so much time. Another reason is the wildlife that has made our yard its home. We have a little rabbit that visits every day, along with a friendly stray cat the whole neighborhood helps care for. One day, I watched the bunny nibbling and pecking around the grass, and it made me think about all the rabbits, birds, and other animals that wander through backyards everywhere. That inspired me to test a few DIY weed killer recipes to see which one actually worked. After trying several, I found one that gave me the best results for treating weeds in smaller areas. Easy to make, easy to use, and it has become my go-to solution for spot-treating unwanted weeds.

Does homemade weed killer actually work?

The answer is yes, but it depends on the type of weeds you are trying to get rid of. A simple homemade weed killer made with salt water and dish soap can be very effective at drying out and killing weeds by breaking down the plant’s protective coating and pulling moisture from the leaves. It works best on small weeds growing in cracks, walkways, driveways, and areas where you don’t want anything else to grow. Keep in mind that salt can build up in the soil and prevent future plant growth, so this mixture should be used carefully and avoided in garden beds or near plants you want to keep. For a natural, budget-friendly solution, this DIY weed killer is a great alternative to many store-bought options.

Where not to use DIY weed killer

While this homemade weed killer can be a great solution for unwanted weeds, it’s important to use it in the right places. Because this recipe contains salt, it can affect the soil and make it difficult for plants to grow in that area. Avoid using it in flower beds, vegetable gardens, or around trees, shrubs, and plants you want to keep healthy. This DIY weed killer is best saved for areas like sidewalks, driveways, patios, and cracks where you want to eliminate weeds without harming surrounding plants.

Although this DIY weed killer is made with common household ingredients, it’s important to remember that it isn’t completely natural or harmless to the environment. Salt is the ingredient that deserves the most caution. Unlike some ingredients that break down over time, salt can remain in the soil and build up with repeated use. Too much salt can make it difficult for plants to absorb water and nutrients and can damage or prevent grass, flowers, and other plants from growing. While I feel this is a simpler and potentially safer alternative to many store-bought weed killers when used in the right areas, it still needs to be used responsibly. I recommend using it only where you don’t want anything growing, such as cracks in sidewalks, driveways, and patios, and keeping it well away from gardens, flower beds, lawns, and other planted areas.

If you’d rather not use salt, I have two other mostly natural options you can try. One simple alternative is a vinegar and dish soap-only weed killer. To make it, combine 1 gallon of white vinegar with 1 tablespoon of liquid dish soap and pour it into a spray bottle or garden sprayer. Spray the mixture directly onto the leaves of the weeds, preferably on a warm, sunny day when rain isn’t expected. The vinegar works by drying out the foliage, while the dish soap helps the mixture stick to the leaves so it can work more effectively. This method works best on young, small weeds and may need to be repeated on larger or more established weeds. Keep in mind that vinegar is non-selective, meaning it can damage or kill any plants it touches, so be careful when spraying around flowers, vegetables, grass, and other plants you want to keep.

Boiling water is another simple homemade DIY weed killer that requires no added ingredients. Carefully pour freshly boiled water directly over the leaves and base of the weed, making sure to thoroughly soak the plant. The intense heat damages the plant tissue and can kill the weed, making this method especially useful for weeds growing in sidewalk cracks, driveway cracks, gravel, or other areas where you don’t want anything growing. For small, young weeds, one application may be enough, but larger or well-established weeds may need a second application after they begin to regrow. You may need to repeat the treatment every few days or as needed until the weed is no longer coming back. Use caution when handling boiling water, and avoid pouring it near desirable plants, grass, or shallow roots, as it can damage or kill them too.

DIY Weed Killer Recipe

• 1 gallon white vinegar (5% acidity)

• 1 cup table salt

• 1 tablespoon liquid dish soap (such as Dawn)

Directions

1. Pour the vinegar into a large bucket or garden sprayer.

2. Stir in the salt until it dissolves.

3. Add the dish soap and gently mix to avoid creating too many suds.

4. Pour the mixture into a spray bottle or garden sprayer.

5. Spray directly onto the leaves of weeds on a warm, sunny, dry day. Try to coat the leaves thoroughly.

Best Time to Apply DIY Weed Killer

For best results, apply homemade weed killer on a warm, sunny, dry day when there is little to no chance of rain for several hours. Sun and heat can help the solution dry on the leaves and increase its effectiveness. Avoid spraying on windy days, since the mixture can drift onto nearby grass, flowers, or other plants you don’t want to damage. Younger, actively growing weeds are generally easier to treat than large, well-established weeds. Check the area again after a few days, and if the weeds are still green or growing back, another spot treatment may be needed.

What to Expect After Applying

After applying your homemade weed killer, you may notice the weeds wilting, drying out, or turning brown within several hours to a day or two, especially when applied on a warm, sunny day. Keep in mind that homemade weed killers often work by damaging the visible leaves and may not completely kill the roots of established or deep-rooted weeds. Give the treatment a few days to work before deciding whether another application is needed. If the weed remains green or begins growing back, you can carefully spot-treat it again, being mindful not to oversaturate the area—especially when using the salt-based recipe. Stubborn weeds may require more than one treatment or may be easier to remove by hand once they have weakened.

Which DIY Weed Killer Should You Use?

Each of these homemade weed-killing methods has its own advantages. The salt, water, and dish soap mixture is best reserved for weeds growing in cracks in driveways, sidewalks, and patios where you don’t want plants to grow. Vinegar and dish soap are a salt-free alternative useful for spot-treating small weeds, although you’ll still want to avoid spraying nearby grass and plants. Boiling water is the simplest option of all and works especially well for weeds growing between pavers or in sidewalk cracks. Whichever method you choose, remember that stubborn or deep-rooted weeds may require another treatment or some good old-fashioned pulling!

I hope this simple DIY weed killer helps you spend less time battling unwanted weeds and more time enjoying your outdoor spaces. I love finding simple, budget-friendly solutions using ingredients we already have at home.

You may also enjoy our DIY wasp spray and DIY bug spray, both made with simple, natural ingredients that are effective, budget-friendly, and easy to make at home. Click the highlighted text for the recipes.

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