Is Baking Soda Really Effective to Get Rid of Moss?

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Moss might be charming on an old stone wall. However, it can be a nuisance if it takes over your driveway, patio, or roof. If you’re looking for a natural, budget-friendly solution, baking soda (sodium bicarbonate) often comes up as a potential remedy. 

But does it actually work? 

Let’s take a closer look at how effective baking soda is at eliminating moss and how to use it correctly.

How Baking Soda Works on Moss

To answer the question, YES, baking soda can effectively get rid of moss. 

Baking soda is alkaline, with a high pH that disrupts the acidic environment moss needs to thrive. When applied directly, it can dry out the moss and inhibit its growth. 

It’s a non-toxic option that’s safe around kids, pets, and most plants (when used carefully), making it a popular DIY choice.

How to Use Baking Soda for Moss Removal

If you’re considering trying this natural method, you can utilize it in two ways, a dry application or as a solution.

Here are the instructions for both applications:

1. Dry Application

Apply baking soda while dry or in a solution to eliminate moss
Apply baking soda while dry or in a solution to eliminate moss. Image: Canva/newlookcasting

For the dry application, you’ll use the baking soda in its solid form to kill the moss. This control method is ideal for sidewalks, patios, and walls. 

Here is what to do:

  • Sweep or brush away loose debris.
  • Sprinkle a generous layer of dry baking soda directly over the moss.
  • Leave it for 24–48 hours. You should notice the moss turning brown or black.
  • After it dries out, scrub with a stiff brush or rinse with water for complete removal.
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2. Wet Application 

You can also mix the baking soda with water to make a potent solution for moss removal.

How to make and use the baking soda solution:

  • Mix 1 tablespoon of baking soda per 1 liter (about 4 cups) of water.
  • Pour or spray directly onto the moss.
  • Repeat every few days until the moss shows signs of drying out.

Ensure that you soak the moss with the solution for quick and effective results.

Pros of Using Baking Soda

Using baking soda to kill moss has the following advantages:

  1. It is an eco-friendly moss control method. Baking soda is safe for the environment and nearby vegetation when applied moderately.
  2. It is non-toxic and won’t harm pets or people.
  3. Since baking soda is readily available, it is an easy and cheap solution for most homeowners.

Limitations and Considerations

While baking soda can get rid of moss, there are some limitations you may need to consider:

  1. It kills existing moss but doesn’t address underlying causes like poor drainage, excessive shade, or compacted soil.
  2. Moss may return if conditions remain favorable for its growth.
  3. On darker materials like black shingles, baking soda can sometimes leave a white residue.
  4. If applied near a lawn, it can kill the grass and alter the soil pH.
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Baking soda can be effective at getting rid of moss, especially in smaller patches or as a short-term solution. It’s affordable, safe, and easy to try. However, since it is a non-selective herbicide, use it moderately to avoid killing your desired grass or vegetables.