Is baking soda good for indoor house plants?

Author: Agnes Steuber  |  Last update: Wednesday, January 14, 2026

Baking soda, a common home kitchen item, is bicarbonate of soda, a compound that's basic on the pH scale. Baking soda raises pH which raises alkaline content. Because of this property, baking soda for plants has commonly been used as a fungicide. Many common fungi germinate best in acidic conditions.

Which plants like baking soda?

Garden anecdotes claim sprinkling baking soda around the base of flowers like geraniums, coneflowers, daylilies, and clematis encourages more blooms. A few teaspoons of baking soda can be mixed with a liter of water and sprayed on other ornamentals, like hydrangeas and lilacs, that thrive in alkaline environments.

How often should I use baking soda on plants?

Preventing powdery mildew

If you want to give it a try, mix 1 tablespoon of baking soda with a gallon of water and a teaspoon of insecticidal soap or light plant oil. Spray this mixture on your plants as soon as you spot the first signs of mildew, and repeat every 7 to 10 days.

What soda can help improve the growth of plants?

Basically, the conclusion is that sugary sodas do not aid in a plant's development, and in fact can retard the absorption of nutrients and water, resulting in death. Diet sodas may be helpful in stimulating plant growth since the lack of sugar will allow the water molecules to easily move to the roots.

How do you spray baking soda for fungus on plants?

Making a fungicidal baking soda spray couldn't be easier. Simply dissolve a teaspoon of the powder into one litre of ordinary water and add a few drops of liquid soap to help the mixture stick to the leaves.

DIY I Stopped Killing My Indoor Plants After I Learned These Tips to Keep My Plants Healthy

Is baking soda OK for house plants?

Baking soda, a common home kitchen item, is bicarbonate of soda, a compound that's basic on the pH scale. Baking soda raises pH which raises alkaline content. Because of this property, baking soda for plants has commonly been used as a fungicide.

How to get rid of fungus in indoor plants?

Remove the leaves or trim any parts of the plant that are infected. Prepare the solution of 1 teaspoon of baking soda in 1 quart of water or a fungicide. Spray the solution liberally to the plant to prevent the fungus from coming back.

Can I spray baking soda and water on my plants?

Baking Soda for Fungal Disease Control

How to Use: Mix 1 tablespoon of soda with 1 gallon of water, a drop of dish soap, and optionally a tablespoon of vegetable oil. Spray this solution on affected plants early in the day to allow for drying.

What does coke do for house plants?

The absorption of these nutrients encourages more rapid growth in the plant. Therefore, pouring soda on plants, such as Classic Coca Cola, is inadvisable. Coke has a jaw dropping 3.38 grams of sugar per ounce, which would certainly kill the plant, as it would be unable to absorb water or nutrients.

Is coffee good for plants?

Coffee grounds contain several key nutrients needed by plants, including nitrogen, potassium, magnesium, calcium, and other trace minerals. These are all nutrients that plants need to grow. The grounds are particularly rich in nitrogen, making them a great addition to compost.

Can too much baking soda hurt plants?

Baking soda is a salt, and all salts—along with other minerals in excess—can be detrimental to plant growth. Salt acts as a desiccant on plants and causes wilted foliage, stunted growth, and eventually, death. Healthy plants can quickly go downhill from an excess of salts.

Why put cinnamon on plants?

There are almost countless uses for cinnamon in the garden: it can be used as a nature-friendly pesticide, a repellent against annoying insects, or as a catalyst to promote root growth in plant cuttings.

Is vinegar good for plants?

Vinegar as a fertilizer: Nope, doesn't work. Acetic acid only contains carbon hydrogen and oxygen – stuff the plant can get from the air. The other things that may be in vinegar could be good for a plant – but it seems an expensive method of applying an unknown amount of nutrition.

How much baking soda do I put on my plants?

Spraying baking soda on the leaves makes the surface become less acidic and limits the ability of fungal spores to grow. To prepare this, mix 1 teaspoon baking soda and a few drops of liquid soap in 1 liter of water and spray the solution on the infected plants.

Can you use hydrogen peroxide on plants?

Saturate the soil with 1/2 cup hydrogen peroxide 3% per 1 litre water. Put wet soil in a watertight container and leave overnight before planting. This kills pathogens such as fungi and bacteria including insect eggs and nematodes (roundworms).

What does aspirin do to plants?

The component helps boost the plant's immune system, just like it does for us. A diluted solution of aspirin water for plants provides accelerated germination and some resistance to disease and pests. Aspirin in vegetable gardens has been shown to increase plant size and yield.

Does milk help plants?

Milk contains some components that can potentially benefit plants. Diluting milk with water and using it as a fertilizer may provide plants with an additional source of nutrients, encouraging plant growth and keeping the plant healthy and disease resistant. These nutrients include proteins, carbohydrates, and calcium.

Is tea good for plants?

Tea is a natural source of tannic acid and nitrogen, which can enhance the fertility of the soil for plant growth. By using leftover tea to water your plants, you can provide them with hydration and nourishment. Additionally, tea can boost plant growth rate and support root development.

Does sugar water help dying plants?

Can We Use Sugar Water For Dying Plants? Although it is not considered a fertilizer, you can use sugar if your plants aren't doing so well. Sugar water in plants can help the microorganisms in the soil break down all the nutrients. It is vastly not recommended, though, to use just the sugar as plant food to save them.

Is baking soda safe for houseplants?

Regular use of a baking soda solution is particularly beneficial for houseplants that require a neutral to alkaline soil pH. However, it's important to use this method judiciously, as too much alkalinity harms plants.

Is Epsom salt good for plants?

Aside from the anecdotal evidence about human benefits, Epsom salt does seem to help plants. Generations of gardeners have said it helps their plants grow bushier, produce more flowers and have better color. It's also said to help seeds germinate and repel slugs and other garden pests.

How to stop bugs from eating leaves?

Use repellents. Non-toxic repellents are available in garden centers that naturally repel bugs with such ingredients as garlic or hot-pepper oil. Some are spray-on liquids, others are granular that can be scattered around the base of plants.

Does cinnamon get rid of mold on plants?

Cinnamon is a spice made from the inner bark of trees of the genus Cinnamomum. It has insecticidal, anti-fungal, and anti-bacterial properties that help treat fungus including botrytis cinerea, colletotrichum musae, and fusarium proliferatum.

How do I get rid of gnats in my house plants?

Mix 1 part 9% hydrogen peroxide with 6 parts water. Allow top layer of soil to completely dry out before drenching the soil in the peroxide solution.

What is the best natural antifungal for plants?

A good place to start is a mix of mild liquid soap and water, sprayed onto houseplants. One teaspoon of soap per litre of water will do the job. It sounds simple, but this formula will treat a lot of common houseplant pests. Add just a teaspoon of bicarbonate of soda and it becomes a great fungicide as well.

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