If you’ve been searching for an inexpensive and natural, inexpensive way to get rid of unwanted grass, you may have come across baking soda as a highly recommended suggestion. The common kitchen staple can be surprisingly effective as a grass killer—if used correctly.
In this post, we learn how baking soda works, when to use it, and a guide on how to use it correctly to kill grass.
How Baking Soda Works As a Herbicide
Baking soda, also known as sodium bicarbonate, is mildly alkaline and has a drying effect on plant tissue. When sprayed directly to grass in high enough concentration, it disrupts the plant’s cellular structure, causing it to dehydrate and die.
When to Use Baking Soda to Kill Grass
While baking soda can kill grass, it works best on small patches of unwanted grass, not entire lawns.
Additionally, it is non-selective, meaning it can harm or kill any plant it touches, including flowers and garden plants. Therefore, don’t use baking soda on your lawn unless you want to kill the grass.
We recommend using baking soda to kill grass in areas like:
- Cracks in driveways or sidewalks
- Between patio pavers
- Around fence lines
- In garden beds where grass is invading
Step-by-Step Guide to Using Baking Soda on Grass
Here are the steps to follow when using baking soda to kill grass:
1. Choose a Dry, Sunny Day
Apply baking soda when the weather is dry and there’s no rain forecasted for at least 24 hours. Sunlight enhances the drying effect.
2. Wet the Grass Lightly
Lightly mist the area with water using a spray bottle or hose if you prefer to use dry baking soda. This helps the baking soda stick to the grass blades.
3. Sprinkle the Dry Baking Soda or Solution Generously
Use a spoon or gloved hand to sprinkle a thick, even layer of baking soda directly onto the unwanted grass.
Alternatively, make a solution of baking soda and water in a spray bottle and spray the weeds. Whichever method you choose, ensure to coat the blades thoroughly.
4. Let It Sit
Allow the baking soda to sit undisturbed for 2–3 days. You should start seeing browning and wilting within this time. Tough or larger patches may require a second treatment. Wait about a week before reapplying.
5. Remove Dead Grass
Once the grass is brown and dried out, remove it with a rake or hoe and dispose of it properly.
Summary
Baking soda offers a simple, chemical-free way to kill unwanted grass—perfect for driveways, patios, and borders. Just remember, it’s powerful in small doses and should be used with care.
With the right technique, you can clear up problem areas and keep your areas around your home looking clean and controlled—without reaching for harsh herbicides.
Lead Editor for Insight Weeds.