Homemade Weed Killer Spray with Vinegar & Essential Oils

QUICK SUMMARY

This homemade weed killer spray is an all-natural way to manage pesky weeds in sidewalk cracks, fence rows, edging, driveways, and landscape areas where you do not want anything growing. It uses vinegar, castile soap, and essential oils to burn down unwanted plants quickly.

Vinegar-based sprays work best on small, young weeds and annual weeds because acetic acid is a contact herbicide. It damages the green plant tissue it touches, so mature perennial weeds with deep roots may need repeated applications or hand-pulling to keep them from coming back. (1, 2)

The essential oils in this recipe are not just for scent. Research has shown that plant oils and their compounds, including cinnamon oil, clove oil, eugenol, and citrus oil compounds, can damage weed tissue, increase cell leakage, and contribute to natural weed-control strategies. (3, 4, 5)

Eliminate Weeds in Your Garden

Nothing can ruin a landscape more than pesky weeds. When we see unwanted plants coming up through the sidewalk, edging, driveway cracks, and fence rows, I get out my all-natural homemade weed killer spray.

This spray does a great job of killing stubborn weeds that make your yard look off-kilter. Reality check: it kills almost anything it touches, so do not spray it on or near plants you want to keep!

That is why I use it for landscaping areas, not in the middle of my vegetable garden. For garden beds, I still prefer to weed by hand so I can protect the roots, soil, pollinators, and all the precious herbs and vegetables I worked so hard to grow.

One thing people always ask me about is weeding. Weeds use nutrients, sunlight, and water that your beneficial plants need to thrive. They crowd out what you intentionally planted, and if you do not get the roots, many of them will return from the grave!

Weeds are such an eyesore, especially when they start sprouting along your carefully placed lawn ornaments, walkways, and garden borders. The most beautifully crafted landscape can begin to look forgotten within weeks as weeds spread fast.

You have to be proactive about weed elimination, or it can take over your entire yard and spread into the garden.

Growing up, our parents told us to pick 1,000 weeds before we could go and play, so is it any wonder I started looking for a natural, homemade weed killer spray?

Obviously, I do not want my yard filled with toxins. After all, my family inhales and ingests what we put on our plants, soil, and outdoor living spaces. This is part of stewardship. What we bring into our homes and yards matters.

This homemade weed-killing spray will help you manage your organic spaces without relying on conventional lawn chemicals. What could be better?

This all-natural, non-toxic spray is one of the kid-friendlier options in our home when an adult is supervising and keeping everyone in the right area of the yard. Just remember: natural does not mean you spray it everywhere. Aim only at the weeds you want gone.

Non-Toxic Gardening Ingredients 101

This weed-killing spray is made with ingredients found in most kitchens. With a few essential oils, you can say bye-bye to weeds and hello to a gorgeous, clean yard.

Organic White Distilled Vinegar: Vinegar works because of acetic acid, which burns down and dries out the plant tissue it touches. This is why weeds can turn brown quickly after spraying.

This is important: vinegar is a contact herbicide. It is best for young weeds, tiny annual weeds, and fresh growth. Larger weeds, deep taproots, and perennial weeds may only get “top kill,” which means the leaves look dead while the root system survives. That is why repeated applications or hand-pulling may still be needed. (1, 2)

Put simply, vinegar is a wonderful natural tool, but it is not magic. Use it wisely, use it early, and use it where you do not want plants growing.

We add the vinegar last, so the essential oils have a chance to disperse in the soap solution evenly. Dispersants are a vital part of DIYs. Soap, maple syrup, honey, and olive oil are all examples of typical dispersants.

Without a dispersant, the essential oils assemble in one place. In a homemade garden spray, that means you may get one strong oily burst instead of an evenly blended solution.

Organic Unscented Liquid Castile Soap or Homemade Dish Soap: Castile soap helps the vinegar cling to the leaves instead of beading up and rolling off. That gives the vinegar more time to work its magic.

If you do not have liquid castile soap on hand, you can use our Homemade Dish Soap. This DIY contains essential oils that can further boost the effectiveness of the weed-killing spray.

Essential Oils: One of my favorite parts of DIYing our weed control is that you are not breathing in gross fumes from conventional lawn products. So many weed-killing sprays on the market come with chemical odors and warnings that make me want to keep my family far away from the yard.

Research on natural weed control shows that many “green” herbicide products rely on botanical oils, clove oil, eugenol, d-limonene, soaps, acetic acid, citric acid, or iron compounds. Most act as fast “burn-down” contact herbicides by damaging leaf surfaces and plant cells. (2)

Wintergreen essential oil has been studied for weed-management potential, including research on invasive plants. (6)

Clove essential oil is rich in eugenol, a natural compound studied for herbicidal activity. USDA research found that clove, cinnamon, red thyme, and summer savory essential oils were phytotoxic in lab and greenhouse testing, causing shoot death in several troublesome weeds. (3)

Cinnamon essential oil is another “hot” oil that weeds do not appreciate. In more recent research, essential oil nanoemulsions made with cinnamon, clove, and other oils caused visible leaf burn symptoms on tested weeds, with cinnamon and ajwain oils producing especially strong desiccation in that research setting. (5)

I use orange essential oil in my ant and wasp killer and in this weed-killing spray. Orange oil is rich in citrus compounds such as d-limonene, which is used in some commercial natural herbicides to help strip the waxy cuticle from plant leaves. (7)

Here’s the thing: these are strong oils. Keep the spray where you want weed control, not where you want flowers, herbs, or vegetables. These “hot” essential oils should come with a warning label!

Make Homemade Weed Killer Spray

This simple weed-killer spray comes together in minutes. When you see how easy it is to make, you’ll regret not doing it sooner!

Weed Killer With Essential Oils

Author Mama Z

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Quantity

2x4x6x

Ingredients

• 1⅓ ounce organic unscented liquid castile soap
• 3 drops wintergreen essential oil
• 3 drops clove essential oil
• 3 drops cinnamon essential oil
• 14 ounces organic white distilled vinegar

Supplies

• 16-ounce Glass spray bottle

Instructions

 

• Place the castile soap and essential oils in a glass spray bottle.
• Pour in the vinegar, replace the lid, and shake vigorously to mix. Spray on weeds as needed.

Notes

This weed killer will destroy anything it comes into contact with, so be sure you don't spray it on anything you want to live!

Step One: Mix the Solution

Place the liquid castile soap and essential oils in a glass spray bottle. We recommend using a dark glass bottle because it helps the essential oils retain their potency.

Then, pour in the vinegar and shake vigorously to mix. Store your solution in a cool, dark place away from any light.

Application: Shake before each use. Essential oils and vinegar-based mixtures can separate, and you want every spray to be evenly blended.

Step Two: Apply to Weeds

To use, spray directly on weeds. This solution works best on a hot, sunny day when the soil and plant leaves are dry. The weeds are thirstier on those days and will soak up the solution, not knowing the fate that lies ahead.

For best results, spray the green leaves until they are coated but not dripping everywhere. Get close to the weed so you do not overspray your grass, flowers, vegetables, herbs, shrubs, or pollinator plants.

Wait a few days and apply the solution again if needed. For bigger weeds, you may need to spray again in about two weeks or pull the root by hand.

Enjoy your gorgeous, weed-free lawn!

Best Places to Use Homemade Weed Killer

This homemade weed killer is best for places where you do not want plants growing at all:

• Sidewalk cracks
• Driveway edges
• Fence rows
• Landscape borders
• Patio cracks
• Gravel paths
• Areas around lawn edging

Do not use it like a fertilizer, garden spray, or lawn treatment. Vinegar and essential oils are non-selective, meaning they can damage desirable plants as well as weeds. (1, 8)

This is also why I do not add salt to my homemade weed killer. Salt may sound natural, but it can build up in soil and make it harder to grow healthy plants later. In a biblical-health home, the goal is not just to kill weeds. The goal is to steward the soil, protect the garden, and reduce the toxic burden on your family.

For garden beds, I still love old-fashioned hand weeding, mulch, healthy soil, good spacing, and consistent maintenance. A healthy organic garden starts with strong plants and daily stewardship, not a one-and-done spray bottle.

Application: Spray early. Small weeds are easier to control than large weeds. The more mature the weed, the more likely it is to regrow from the root.

Homemade Weed Killer FAQs

What is the best homemade weed killer?

The best homemade weed killer for sidewalks, edging, fence rows, and cracks is a vinegar-based spray with castile soap and essential oils. Vinegar burns down the green plant tissue, soap helps the spray stick, and essential oils such as clove, cinnamon, wintergreen, and orange add extra plant-based power.

Does vinegar kill weeds permanently?

Sometimes, but not always. Vinegar works best on very young weeds and annual weeds. Larger weeds and perennial weeds may brown on top but regrow from the root, so you may need repeated applications or hand-pulling. (1, 2)

Will homemade weed killer kill grass?

Yes. This homemade weed killer can damage grass, flowers, herbs, vegetables, and shrubs. It is non-selective, so only spray plants you want to kill.

Can I use homemade weed killer in my vegetable garden?

I do not recommend spraying it in the middle of a vegetable garden. It can drift onto plants you want to keep, and vinegar can affect tender leaves. In garden beds, hand-pulling, mulch, and healthy soil are safer long-term choices.

When is the best time to spray weeds?

Spray weeds on a hot, sunny, dry day when there is no rain in the forecast and little to no wind. Contact herbicides work best when they thoroughly coat the leaves and have time to sit.

Why do you add castile soap to homemade weed killer?

Castile soap acts as a surfactant. It helps the vinegar and essential oils spread over the leaves and stick to the plant surface instead of sliding off.

Can kids help use this homemade weed killer?

Kids can help with adult supervision, especially if they are old enough to understand where to spray and where not to spray. I would not let little ones mix the essential oils or spray freely around the yard. Keep the nozzle pointed at weeds only, and avoid eyes, skin, pets, pollinators, and desirable plants.

Is homemade weed killer better than glyphosate?

For our family, I prefer natural weed control for everyday landscaping because I do not want unnecessary herbicide exposure around our home, garden, and children. Current regulatory and scientific discussions around glyphosate are still debated: EPA has stated that glyphosate is not likely to be carcinogenic to humans, while IARC classified glyphosate as probably carcinogenic to humans. (9, 10) For home use, simple steps like hand-pulling, mulch, and targeted natural sprays can help reduce chemical load.

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