Sodium Bicarbonate In Gardens: Using Baking Soda On Plants

By: Bonnie L. Grant, Certified Urban Agriculturist

Baking soda, or sodium bicarbonate, has been touted as an effective and safe fungicide on the treatment of powdery mildew and several other fungal diseases. Recent studies confuse the efficiency of using this common household item. The compound seems to prevent some fungal spore flare ups but doesn’t kill the spores.

Is baking soda good for plants? It certainly doesn’t seem to do any harm, but it isn’t the miracle cure for those mildew beleaguered roses either. Baking soda as a fungicide does appear to diminish the effects of fungal diseases on common ornamental and vegetable plants.

Sodium Bicarbonate in Gardens

Numerous trials have been done to study the effects of baking soda sprays on plants. The ATTRA organization, which assists rural and agricultural growers with common production issues and plant information, published a series of findings from trials across the globe. Overall, baking soda on plants had a beneficial effect in reducing fungal spores.

Some concerns, however, were raised over sodium bicarbonate in gardens because of the first part of the compound. Sodium can burn leaves, roots and other plant parts. It can also stay in soil and affect later plants. No serious buildup was found, however, and the Federal EPA has cleared sodium bicarbonate as safe for edible plants.

Using Sodium Bicarbonate on Plants

The best concentration of baking soda is a 1 percent solution. The remainder of the solution can be water, but coverage on the leaves and stems is better if some horticultural oil or soap is added to the mixture.

Sodium bicarbonate as a fungicide works by disrupting the ion balance in the fungal cells, which causes them to collapse. The biggest danger in using sodium bicarbonate on plants is the potential for foliar burn. This appears as brown or yellow patches at the end of the leaves and can be minimized by thorough dilution of the product.

Is Baking Soda Good for Plants?

Baking soda on plants causes no apparent harm and may help prevent the bloom of fungal spores in some cases. It is most effective on fruits and vegetables off the vine or stem, but regular applications during the spring can minimize diseases such as powdery mildew and other foliar diseases.

A solution of 1 teaspoon (5 mL.) baking soda to 1 gallon a (4 L.) of water reduces instances of leaf burn. Add 1 teaspoon (5 mL.) dormant oil and ½ teaspoon (2.5 mL.) of dish soap or horticultural soap as a surfactant to help the mixture stick. Keep in mind the solution is water soluble, so apply on a dry cloudy day for best results.

While some trials and scientific research mitigate the effectiveness of baking soda against fungal diseases, it won’t hurt the plant and does have short term benefits, so go for it!

BEFORE USING ANY HOMEMADE MIX: It should be noted that anytime you use a home mix, you should always test it out on a small portion of the plant first to make sure that it will not harm the plant. Also, avoid using any bleach-based soaps or detergents on plants since this can be harmful to them. In addition, it is important that a home mixture never be applied to any plant on a hot or brightly sunny day, as this will quickly lead to burning of the plant and its ultimate demise.

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10 FAQs About Using Baking Soda For Garden Pests

Whether your garden is big or small, you are bound to encounter problems with garden pests from time to time.

These days, we are more aware than ever of the dangers of using powerful chemicals in the home and garden.

Luckily, many natural alternatives are safe and effective for repelling and eliminating insect pests and more.

In this article, we answer ten of the most frequently asked questions about using baking soda (Sodium bicarbonate) to deal with garden pests.

Baking Soda Is A Gardener’s Best Friend – Here Are 15 Nifty Uses In The Garden

Gardening is one in all the most effective physical activities you’ll be able to do, because it comes with countless physical and mental state benefits. Moreover, fresh and home-grown produce is of much higher quality than the one we back up a market, and therefore the taste is just incomparable.

Yet, did you recognize that sodium hydrogen carbonate are often your magic wand within the garden?
This versatile agent is your succor when it involves the whole home, because it is an incredible kitchen ingredient and excellent nail clipping and cleaning product of all time, trust me.

Baking soda, rather than the synthetic chemicals, may be a safer and cheaper for your garden. You can use these ways of baking soda in your Garden:

  1. Insectifuge

To keep the critters away, mix one tablespoon of vegetable oil, two tablespoons of bicarbonate of soda, and a pair of drops of soap with a gallon of water. Spray it within the garden every three days. Gently spray this mixture within the garden every three days to stay the bugs away.
Mix flour and bicarbonate in equal amounts and dirt any produce growing with Cabbage worms, and you’ll destroy them. Mix 5 tablespoons of hydrogen carbonate with the identical amount of granulated sugar, and a tablespoon of water, and pour the mixture into anthills. Add a small amount of vinegar, and you’ll reduce the ant population round the garden.

  1. Fungus, Mildew, and Weeds

To get obviate the fungus within the garden, mix 4 teaspoons of hydrogen carbonate with one gallon of water, and apply the mixture to problem areas.
To protect the fruits and veggies from mildew, spray them with a mix of 1 tablespoon of bicarbonate of soda, 2.5 tablespoons of horticultural oil, and one gallon of water. To get eliminate weeds, especially crab grasses that grow between the cracks in your walkways, moisten the realm, and add a thick layer of saleratus into the cracks to make a paste.

  1. Compost and Soil

To test the pH of the soil, you’ll need half a cup of bicarbonate and half a cup of vinegar. Next, get two samples of soil and place them into separate containers. Pour vinegar into one among the samples, and if it bubbles, its pH is above seven or alkaline. just in case it doesn’t, add bicarbonate with half a cup of water to the opposite sample, and if it bubbles now, it’s acidic. To decrease the extreme odor of compost, sprinkle just a touch of saleratus on the highest of the pile.

  1. Taste and appearance of the plants

Tomatoes are sweeter when grown in less acidic soil, so sprinkle a small amount of sodium bicarbonate within the soil around them. To stimulate the blooming of begonias, hydrangeas, and geraniums, water them monthly with a singular tonic product of two quarts water and one tablespoon bicarbonate.
To make your lilies, iris’s, geraniums, and daisies grow healthier and brighter, before watering them, add some bicarbonate to the water.

  1. Cleaning

Use saleratus to wash the decorations in your garden. Wash them with a quart of warm water and two tablespoons of bicarbonate. Dip a brush into the mixture and scrub the stains away.Baking soda is superb for cleaning the garden walkways further. once they become covered in weeds and grimy, wash them with the identical mixture, and that they will become beautiful again. Clean and deodorize the garden tools with sodium bicarbonate.

  1. Put it to your plants to induce obviate mildew.

Just like the tip about fungus, hydrogen carbonate may also kill mildew which will rot your plants (fruits and vegetables in particular). All you’ve got to try and do is mix a tablespoon of sodium bicarbonate with two and a half tablespoons of horticultural oil in an exceedingly gallon of water. Put it in an exceedingly bottle and spray it on your plants to offer them a protective layer against mildew.

Tomatoes become sweeter after they grow in soil that’s less acidic—so why not provides it a try? All you have got to try and do is sprinkle saleratus lightly onto the soil they’re growing in and let it absorb naturally. When they’re finally able to eat, they ought to have a sweeter and more tart flavor than you’ll be used to!

  1. Use it to form your bouquets last a bit more longer.

it’s great to bring flowers inside the house everytime for adornment but they always seem to wilt prior we’d like. To fight back, try throwing a pinch of salt and a pinch of bicarbonate of soda into a vase together with water for the flowers. With any luck, the mix should extend their life a minimum of for a long time.

  1. Put it on compost to form it a touch less smelly.

Some of us have gotten into composting as some way to be more sustainable and good to the environment. Still, the method produces some unbelievably bad smells. Fortunately, there’s a simple fix for this. All you’ve got to try to to is add a bit little bit of sodium hydrogen carbonate on top to soak up a number of the odor and fix the acidity a bit. Don’t do an excessive amount of, though, or you’ll slow the decomposition process entirely!

  1. Brighten up your garden walkways with it!

The winding paths we’ve through our gardens are often beautiful and relaxing to steer through… until they begin getting grimy and covered in weeds. Once again, saleratus can help! Try washing their surfaces with two tablespoons of bicarbonate and a quart of warm water (use these proportions for however much solution you make). Add a bit more sodium bicarbonate for tougher stains. After that, dip a brush in and scrub away! use caution to not spill the answer in any delicate garden beds, though.

  1. Make your flowers bloom even brighter and shine even better.

Just like with the tomatoes we mentioned earlier, certain flowers thrive in alkaline soil. To push the soil that way, try mixing a bit hydrogen carbonate into their watering pot before you allow them to drink. after they finally bloom, they must be brighter and healthier than they would’ve been otherwise!

  1. Use it to exterminate any annoying patches of crabgrass.

If you don’t already know, crabgrass are those annoying and fibrous little chunks of grass that appear to always grow back between sidewalks and other problem areas. For a straightforward thanks to get obviate them in order that they won’t come, all you’ve got to try to to is moisten the matter area and apply a thick amount of bicarbonate of soda so it turns into a paste. Sweep the paste into any cracks and it should wipe out any weeds you will have—just keep it off from the grass you want!

  1. Stop cabbage worms in their tracks.

Even if you don’t grow cabbages specifically, cabbage worms can really wreak havoc on any well-meaning garden. Fortunately, there’s a straightforward solution. Mix an equal amount of flour and bicarbonate and use the mixture to dust whatever produce you will be growing. Though the worms will still try and eat the plants, the mixture will kill them off once they do!

  1. Use it to wipe down your houseplants!

If you have got any big plants inside that gather dust or grime, it are often hard to effectively clean them since you can’t use the standard chemicals. To shine them up a bit without hurting them, just use a bit little bit of sodium hydrogen carbonate and warm water and wipe them gently. they must be good as new!

  1. Finally, put it everywhere your hands after a protracted day of working within the garden!
    Although gardening are often both relaxing and rewarding, a full day of it can result in some very dirty hands that are hard to induce clean. Once again, saleratus can come to the rescue here! All you have got to try and do is wet your hands and acquire them coated within the sodium hydrogen carbonate. Use a nail brush for the particularly hard spots and you must be good to go!

How to Use Baking Soda as Organic Fungicide for Your Garden

Updated 08/07/2020

The use of baking soda as a fungicide is not new and has long been utilized by gardeners to protect their plants. Scientifically known as Sodium Bicarbonate, it has been an effective and safe fungicide for the treatment of various fungal diseases such as powdery mildew. It is also effective at eliminating the effects of fungal diseases on common vegetable plants.

When baking soda is sprayed on plants, it disrupts the ion balance of fungal cells, which causes them to collapse. Also, fungal spores are eliminated because the baking soda leaves alkaline residues on the surface of plants.

Apart from acting as a fungicide, it has several other benefits in the garden. These include but not limited to:

Keeping plant leaves and flowers fresh and clean.

Sweetening the taste of tomatoes.

Let’s dive a bit deeper into the pros and cons of using baking soda as a fungicide.


It is organic and eco-friendly.

It is less expensive than commercial fungicides and does the job perfectly.

It prevents mold from growing on plants.


The first compound of baking soda, sodium, can burn roots, leaves and other plant parts in some cases

Consistent usage of baking soda on plants can cause bicarbonate to accumulate in the soil thus it has an impact on soil nutrients, which will lead to slower growth of the plant.

Baking soda is also a kind of salt, and its excessive use hurts plants in two ways:

Firstly, it blocks plants’ tissue cells and as a consequence, plants may become unable to take in the amount of water they require.

Secondly, too much salt can accumulate in the plant and cause, ion toxicity which eventually harms the plant.

However overall, and when used in moderation, baking soda causes no major problems and is therefore generally safe to use as a fungicide on plants. As a spray, it can achieve amazing results against fungus and herbivore bugs. Also, it is organic and doesn’t cause any kind of harm to the environment thus, it is a handy solution for plants in your garden if you don’t want to sprinkle chemicals like suspended sc out there.

How does it work?

It is as simple as it sounds. Upon ingestion by insects, the compound sodium bicarbonate releases carbon dioxide into their bodies, eventually leading them to death.

How can fungi affect plants?

Fungi survive on the energy from the plants they live or settle in. As the fungi grows, the vitality of the plant diminishes. Plant fungus can quickly damage your plant and eventually a total plant collapse.

Fungi come either from the air or from the soil. They travel through the air via spores and settle onto the plant’s leaves, or they may enter a plant through the root.

Making Fungicide Out of Baking Soda

Before spraying the solution made at home, you should always perform a patch test on your plants and wait to see how it performs before spraying it in the rest of you garden. This patch test will also help you know if the concentration and dilution of the solution you prepared might lead to the burning of leaves.

A common preparation:

3 Tablespoons of Baking Soda

Mixing it in the sprayer and then spraying on the plants can be an effective preventive method against any fungal diseases or insects.

A wider range of protection:

1 Tablespoon Oil (Preferably Vegetable Oil)

2 Drops dishwashing liquid

This solution will be even more effective than the first one described above. The oil will increase the solution’s ability to kill insects or fungal viruses, while adding dishwashing liquid will help the solution stay where it is sprayed by increasing its viscosity. This solution will also help in controlling the fungal disease “Powdery Mildew”: a common disease that afflicts many types of plants, especially if the growing season has been particularly wet.

A Strong Solution:

2 TableSpoons Baking soda

1 Tablespoon soap (Recommended: Castille Soap)

The addition of neem oil makes an even more effective solution. The neem oil has fungicidal benefits from the Azadirachtin and Nimbin it contains . Therefore, neem oil and baking soda, when mixed together, offer an even more effective treatment against fungal diseases like Powdery Mildew. This solution is recommended when you have already infested plants in your garden. The soap in the ingredient works the same as glue. It helps the solution to stick to the leaves of the plant and can eliminate the fungal spots more effectively.

Using baking soda in combination with other natural methods of repelling pests and weeds can keep your plant safe and protected against any further infestations.

The baking powder fungicide should be only applied while it’s dusk. Applying it on a sunny day or when the sun is out might lead to the burning of your plant’s leaves. Also, make sure it won’t rain within the next 24 hours after application.

Fungicide made by baking soda works best as a preventative measure, but it can also be effective in eliminating existing fungal diseases. For prevention, it is one of the best working methods to opt for. In most cases, it prevents the formation of spores that cause diseases and is effective at keeping herbivore insects away. Always remember that prevention is better than cure. Therefore, baking soda and other such natural remedies work best before you have problems.

Owais Shah is the founder of Town Hustle, a pest control blog which deals with all kinds of insecticide reviews. He has written extensively about controlling pests in your home.

3. Use Baking Soda to get rid of Powdery Mildew

If your rose is invaded by powdery Mildew and the plant is becoming unhealthy then its use is beneficial. Use baking soda spray to prevent powdery mildew. 7 spoons of sodium bicarbonate, a little bit of liquid soap, 5-gallon water mix well. Spray the prepared mixture for a few days. Always check, some plants may be sensitive to it because of which can burn. Sprinkle the mixture once a week for better results.

5 more uses for baking soda in the garden:

1. Eliminate powdery mildew: Mix 1 tablespoon baking soda, 1 gallon water, 1 tablespoon vegetable oil, and 1 tablespoon dish soap. Spray weekly on affected plants.

2. Refresh rose bushes: Water roses with 1 teaspoon baking soda, 1/2 teaspoon clear ammonia, and 1 teaspoon Epsom salt in a gallon of water.

3. Make a fungicide: Combine a gallon of water with 1 tablespoon baking soda, 21/2 tablespoons vegetable oil, and 1/2 teaspoon of castile soap. Spray on the foliage of diseased plants.

4. Test your soil pH: Wet the soil and sprinkle a small amount of baking soda onto it. If the baking soda bubbles, your soil is acidic with a pH level under 5.

5. Repel garden pests: Rabbits, ants, silver fish, and roaches don’t like baking soda. Sprinkle it on the perimeter of your garden to keep them away.

Reprinted from The Baking Soda Companion by Suzy Scherr with permission from Countryman Press, 2018.

Baking Soda And Insect Control

Does baking soda kill insects? Yes.

Whether you have a roach, ant, slug, rat, or bed bug problems, baking soda can be used effectively against such pests. The process for using this compound may vary depending on the type of pest problem being faced.


A bait is prepared using equal parts of sugar and baking soda.

Ants get easily attracted to sugar and will waste no time swooping on your bait. Once ingested, the effects of the baking soda kicks in. It reacts with the acid in their digestive system which is very toxic and kills them in no time.


Roach extermination can also be done using this natural method. Similar to ant control, a roach bait is prepared by mixing equal parts of sugar and baking soda. While the sugar serves to attract roaches, the baking soda does the job of killing them.

Once ingested, it becomes poisonous when reacting with the acid in their digestive system. When making this bait, it should be mixed in a shallow bowl and placed around areas where roaches are common, especially the kitchen area.

This process can be repeated until there’s a clear improvement in your pest situation.

Using baking soda for roaches has proven to be effective. As we’ve seen, it can either be used alone or as bait by mixing it with other substances like sugar. This provides natural relief in addition to being inexpensive. It can also be used together with other pest control methods.

Baking Soda Use in Pest Control – Safety Considerations

This is an important aspect of pest control. Baking soda, in this case very harmless.

It is used around the home for several purposes including personal hygiene as well as a cleaning agent. This can be generously applied for the best results.

Watch the video: 8 POWERFUL HOMEMADE ROOTING HORMONES. Natural Rooting Stimulants for Gardening

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