Baking Soda In The Garden: 7 Garden Hacks Every Gardener Should Know

Baking soda isn’t just a one-trick pony; it’s a versatile maestro that conducts a symphony of eco-friendly and cost-effective garden hacks.

From fending off pests to combating plant diseases, this unassuming white powder is your ticket to a greener, healthier garden. 

Beyond its culinary charm, this unassuming pantry essential emerges as a green superhero, ready to revolutionize your gardening experience.

With its versatile applications, baking soda is a silent ally, promising an eco-friendly and pocket-friendly transformation for your beloved green haven. 

Sprinkle a bit of this enchanting magic, and witness your garden flourish like never before!

1. Fungicide & Disease Control

Powdery mildew, the bane of many gardeners, doesn’t stand a chance against this simple yet potent baking soda fungicide. 

Follow these easy steps to prepare a solution that will have your plants thanking you:


  • 1 tablespoon of baking soda
  • 1 teaspoon of liquid soap
  • 1 gallon of water

Crafting the Potion

  1. Mix the baking soda and liquid soap in a gallon of water.
  2. Stir the solution thoroughly to ensure the baking soda dissolves completely.
  3. Pour the mixture into a spray bottle for easy application.

Apply the fungicide on affected plants at the first sign of powdery mildew.

Repeat the application every 7-14 days, depending on the severity of the issue. Apply in the early morning or late evening to prevent leaf burn from the sun.

Beyond Powdery Mildew

Explore other ways this kitchen champion can help in preventing and controlling various fungal diseases in your garden:

  • Black Spot on Roses: Mix 1 tablespoon of baking soda with a gallon of water and a few drops of dish soap. Spray the solution on rose bushes to combat black spots.
  • Tomato Blight Prevention: Sprinkle baking soda around the base of tomato plants to deter blight.

2. Natural Insecticide

Garden pests, meet your match! Bid farewell to chemical-laden insecticides and embrace the natural power of baking soda and flour in this homemade concoction:


  • 1 cup of baking soda
  • 1 cup of all-purpose flour


  1. Combine equal parts baking soda and flour in a bowl.
  2. Stir the mixture thoroughly to achieve a uniform blend.


Dust the baking soda and flour mixture onto plant leaves and surrounding soil. Focus on areas where pests are likely to congregate, such as the undersides of leaves.

Directly apply the baking soda and flour mixture on plants prone to pest infestations. Focus on vulnerable areas like new growth and flower buds.

3. Weed Control

Bid farewell to invasive weeds with a natural touch by incorporating baking soda into your weed control arsenal. 

Here’s a simple recipe for a homemade weed killer:


  • 1 cup of baking soda
  • 1 cup of salt
  • 1 tablespoon of dish soap
  • 1 gallon of vinegar
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Mixing the Solution

  1. Combine the baking soda, salt, dish soap, and vinegar in a large container.
  2. Stir the mixture until the ingredients dissolve, creating a potent weed-killing elixir.
  3. Pour the solution into a spray bottle or garden sprayer. 
  4. Directly apply the natural weed killer to unwanted vegetation, ensuring thorough coverage.

Cautionary Notes on Using Baking Soda Near Desirable Plants

While baking soda proves itself to be a formidable weed control agent, caution is critical when applying it in proximity to plants you want to thrive.

Consider the following notes:

Selective Application

Apply baking soda-based weed killers with precision, targeting only the unwanted vegetation.

Use protective barriers like cardboard or plastic sheets to shield desirable plants during application. 

Applying the Right Amount

Baking soda, when used excessively, can alter the pH of the soil, impacting plant health.

Use sparing amounts and monitor the reaction of desirable plants closely.

Strategic Application Timing

Apply the weed killer when desirable plants are less vulnerable, such as during dormant seasons. Avoid application during the active growth phase of plants you wish to protect.

Before widespread application, conduct a small-scale test in a controlled area to observe the impact on surrounding plants. Adjust the concentration or application technique based on the results of the test.

4. Soil pH Adjustment

Baking soda isn’t just a kitchen magician; it’s also your ally in cultivating sweeter, more robust tomatoes. 

Here’s how to use it to adjust soil pH for the perfect tomato harvest:

Identifying pH Imbalance

Test your soil to determine its pH level, especially if your tomatoes aren’t reaching their flavor potential. Tomatoes typically thrive in slightly acidic to neutral soil (pH 6.0 to 7.0).

Start with about a tablespoon of baking soda per plant for small tomato plants. Larger plants may require up to two tablespoons.

Sprinkle the calculated amount of baking soda around the base of each tomato plant.

Work the baking soda into the topsoil without damaging the plant’s roots.

Monitoring and Adjusting

Monitor the soil pH regularly, adjusting the baking soda application to maintain the desired pH level.

Aim for a gradual adjustment to prevent sudden pH shifts.

Guidelines for Neutralizing Soil pH in Acidic Areas

Baking soda isn’t just for sweetening tomatoes but also for neutralizing soil acidity. 

Follow these guidelines to balance the pH in areas where acidity is a persistent issue:

  • Soil pH Testing: Conduct a thorough soil pH test to determine the extent of acidity. Baking soda is particularly effective in slightly acidic to moderately acidic soils.
  • Calculation for Neutralization: Determine the amount of baking soda needed based on the severity of soil acidity. Start with a modest application, such as 5-10 pounds of baking soda per 100 square feet.
  • Even Distribution: Spread the calculated baking soda evenly over the soil surface. Use a rake or garden fork to incorporate the baking soda into the top layer of the soil.
  • Watering Considerations: Water the area thoroughly after applying baking soda to aid its absorption into the soil. Reapply as needed, keeping a close eye on pH levels over time.
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5. Cleaning and Maintenance

Harness the cleaning prowess of baking soda to revive your garden tools, removing dirt and preventing rust. 

Simple Baking Soda Solution

  1. Mix 1 part water to 3 parts baking soda to create a paste suitable for cleaning and rust removal. 
  2. Adjust the paste’s consistency as needed, ensuring it adheres to the surface of your tools.
  3. Apply the baking soda paste to the surfaces of your garden tools, concentrating on areas with rust or stubborn grime.
  4. Scrub the tools with a brush or an old toothbrush to remove the debris.
  5. Rinse the tools thoroughly with water to remove the baking soda residue.
  6. Dry the tools completely to prevent future rusting.

Odor Control in Compost Piles Using Baking Soda

Baking soda comes to the rescue to neutralize these smells. Sprinkle a handful of baking soda over your compost pile periodically. Focus on areas with strong odors or where decomposition is most active.

Incorporate baking soda into the compost layers as you build or turn the pile. Ensure even distribution to maximize its odor-neutralizing effects.

6. Guarding Your Tomatoes

Tomatoes, the crown jewels of the garden, are unfortunately susceptible to various diseases that can hinder their growth and yield. 

Here’s a simple yet effective method to fortify your tomatoes against diseases right from the start:

What You’ll Need

  • Baking soda
  • Tomato plants


  1. Dig a hole appropriate for transplanting Before placing your tomato plant into the soil.
  2. Measure approximately a tablespoon of baking soda for each tomato plant. This quantity is sufficient to create a protective environment for the plant.
  3. Sprinkle the measured baking soda directly into the planting hole. Distribute it evenly across the soil, ensuring it’s well-mixed with the surrounding earth.
  4. Gently place the tomato plant into the prepared hole, making sure it’s at the appropriate depth and adequately supported.
  5. Cover the tomato plant’s roots and base with soil, ensuring the baking soda is well-mixed throughout the planting area.
  6. Give your newly planted tomato watering to settle the soil and activate the baking soda.
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7. Fresh Hands, Happy Gardening

After a day of tending to your garden, the last thing you want is to be greeted by unpleasant odors lingering in your trusty garden gloves. Luckily, the solution is as simple as reaching for your kitchen cupboard—baking soda. 

Here’s a quick and effective way to keep your garden gloves fresh and ready for action:

What You’ll Need

  • Baking soda
  • Garden gloves


  1. Before deodorizing, make sure your garden gloves are dry. If damp from sweat or moisture, allow them to air dry thoroughly.
  2. Sprinkle a generous amount of baking soda inside each glove. Aim for an even distribution, covering the interior surfaces where your hands come into contact.
  3. Give the gloves a good shake to help distribute the baking soda evenly. For added effectiveness, rub the baking soda into the fabric or leather of the gloves.
  4. Allow the baking soda to sit inside the gloves for a few hours or overnight. This gives it time to absorb moisture and neutralize odors.
  5. Before wearing the gloves again, shake out any excess baking soda. You can also turn the gloves inside out and give them a gentle shake to remove the powder.

Baking Soda’s Garden Magic Unleashed

Baking soda emerges as a versatile and invaluable ally for every green-thumbed enthusiast. Baking soda fosters a healthier, more vibrant garden, from fending off fungal foes to sweetening tomatoes and revitalizing garden tools.

We’ve seen how baking soda acts as a natural fungicide, insecticide, soil pH adjuster, weed controller, and even a handy tool in garden maintenance.

Its eco-friendly and cost-effective nature makes it a go-to solution for gardeners looking to enhance their gardening experience.

Lucy Young

Meet Lucy, a seasoned gardener with a green thumb and a wealth of experience cultivated over 10 years in her own backyard oasis. Now, she channels her passion into writing, sharing invaluable gardening knowledge on her website. From nurturing plants to expert pruning techniques, Lucy's articles are a treasure trove for both seasoned enthusiasts and budding gardeners. Join her on this leafy journey as she sprinkles insights, tips, and tricks to help you create your own flourishing paradise. Get ready to dig into her gardening wisdom and unlock the secrets of a thriving garden!

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