How to Use Baking Soda As Weed Killer?

Weeds are the misery of a gardener’s life. They are unintended plants in landscapes, garden beds, and hardscapes. If they are left uncontrolled, they convert a well-growing, cultivated lawn into a messy-looking lawn. 

In addition to harming the plant’s growth by competing for sunlight and nutrient sources, weeds also harm the yard’s aesthetic value and reduce the plant’s vigor and health.

Luckily, there are some organic, natural ways to kill weeds that are much safer than applying harsh chemical herbicides that have the potential danger to children and pets. 

The use of baking soda as weed killer is the prominent natural weed killing method. It includes many other methods like vinegar, apple vinegar as the organic fungicide, and weed killers.

Importance of natural weed killers

Organic controlling methods are always the best turn for eliminating or eradicating the weeds, diseases, and pests from the lawn or garden. Similarly, baking soda is an effective, organic weed killer that has no health risks and without any harms to the environment.

While the chemicals control for any pests, diseases, or weeds, have potential harms to the environment and plants by losing their vigor and disease defending potential. The chemical poses stress, loss of vigor, and burns. 

A tree or other plant treated with chemicals becomes more susceptible to the invasion of pests and diseases

Does Baking Soda Kill Weeds? 

Yes, baking soda kills the weeds if applied properly all over the plant including foliages, and stems. 

Baking is an organic, natural, post-emergent weed killer and a great solution for solving gardening problems including weeds, fungus, killing moss, and compost odor

Baking soda is a great natural weed killer that kills the plants without posing any environmental threats to humans and pests. It actually draws water from the weed plants and forces the foliage to dry off. 

It is also known as Sodium Bicarbonate in scientific terms and is considered phytotoxic to plants. 

To use as a weed killer, mix the baking soda with water and surfactant and spray it over the weed plants. Moist the plant entirely to get it to die off completely.

Baking soda is an organic weed killer and a non-selective contact herbicide that kills weed plants on content and after sprouting from the ground.

How does baking soda kill weeds?

Baking soda is actually the sodium bicarbonate that is phytotoxic in nature and much toxic to plants. The phytotoxic properties of baking soda assist in killing weeds by damaging the plant’s body functions.

Baking soda kills weed plants by forcing out the water from plant cells of weed plants and leaving dry out foliage that eventually dies. Phytotoxicity is the nature of sodium bicarbonate that draws water from plant cells and deprives it of much-needed water.

Many chemical weed-killing sprays used for gardens, pathways, and lawns are phytotoxic.

It actually increases the salinity due to sodium in the bicarbonate compound that draws out water from the plant cell. This phenomenon is the main control aspect of using baking soda as a weed killer.

It shows varying results when applied in varying concentrations and soil properties, and environmental conditions.

How to Use Baking Soda to Kill Weeds

The main thing in using baking as a weed killer is to know the application method and dilution level for killing weeds. 

Baking soda is an organic weed killer that is effective in killing young weeds and has to struggle hard for killing mature weeds. 

To apply baking soda to the weed plants, you will need baking soda, water, surfactant, and a sprayer.

Here are the simple steps on how to get rid of weed in the lawn by using baking soda:

Solution method:

  • Firstly, experiment with the baking soda remedy on one or two weeds to check its effectiveness.
  • If it found effective, dilute the baking soda in water and add a surfactant in solution to adds stickiness to the solution. Soak the affected area with baking soda solution by saving the grass and plants.

Dry method:

  • Pour the little amount of baking soda on weed plants at the rate of one tablespoon per plant. Spread the baking soda on the entire plant including foliage and stem. 
  • Treated weed plants get to turn brown or black in color after few days of application.

By using both of the methods, weed plants will get die in-ground and turn black. Now it’s your turn to pull the dead weeds from the ground with help of a weed remover or shovel.

Replant the uprooted patches of lawn with new grass seed or sod to prevent the again attack of weeds.


How to use baking soda to kill weeds on pathways?

Baking soda can also be used as an organic weed killer for killing weeds on pathways, driveways, patios, and walkways by pouring the baking soda in between cracks or on weeds.

Tip: Baking soda gives effective results if applied early in the day when the plant’s stomata are open and the plant is active. Day temperature of more than 85 degrees Fahrenheit speed up the effect. 

If it’s not rain after a week of application, then water the weeds with 0,5 to 1 inch of water to increase the absorbance of water to speed up the weed-killing process.

Does baking soda kill weeds permanently?

Weeds management is the never-ending task in gardening and landscaping. Once you get rid of one type of weed, a whole new convoy of weed is ready to attack. But baking soda has longer terms and effective results.

Baking soda kills the plants by increasing the salinity outside of the plant’s body that draws out the water from the plant body and kills the weed. In this way, the soil salts in this patch get a little more for weeds that keep the weeds out for more time.

Can You Mix Baking Soda and Vinegar To Kill Weeds?

Vinegar or acetic acid is an effective method for killing weeds like dandelions by decreasing their body moisture. Vinegar is known as a natural weed killer that helps to eradicate weeds.

By using the mixture of baking soda and vinegar, you will get wonderful, effective results as both are strong weed killers. This mixture can be used either as a spray or a paste.

Precautions of using baking soda as a weed killer

Baking soda is strong phytotoxic in nature that kills the plants by absorbing their body moisture. In addition to their effective weed killings, it also has some precautions to use that might harm your lawn.(Source)

Here are some precautions of using baking soda as weedicide:

  • Always test one or two weed plants before application to measure the effectiveness.
  • Cover the other grass or flowering plants while using baking soda and vinegar mixture.
  • In case of concentrated application, rinse off the patches with a lot of water to remove the excess salts from the soil patch.
  • Avoid using baking soda in high salinity areas like beaches.
  • Always follow protective measures of wearing a mask and gloves before application of baking soda and vinegar.

How to Get Rid of Crabgrass Using Baking Soda

Weeds are the most disturbing thing for gardeners and they want to eliminate them as early as possible without harming their garden plants and lawn. Similarly, crabgrass is a major problem for many landscapers and gardeners. 

Baking soda or sodium bicarbonate has phytotoxic nature to plants and can be used as an effective natural method for getting rid of crabgrass.

  • First of all, moist the crabgrass in your lawn
  • Pour the baking soda on the crabgrass plants completely
  • Uproot the dead crabgrass plants from the lawn with the help of a shovel or weed remover tool
  • Reseed the bare patches of lawn with new grass seed or sod. If you don’t reseed the lawn, it will attract new weeds.

Does baking soda kill lawn fungus?

Sodium Bicarbonate is an effective fungicide for treating many fungal diseases of lawns including controlling powdery mildew. It disrupts the ion balance of fungal cells and causes them to collapse. It also eliminates fungal spores by the alkaline residues of baking soda on the leaves of plants.

 Additionally, they are also effective to control many fungal diseases in vegetables.

It is used as a fungicide by diluting the baking soda in water and testing its concentration on a little patch of lawn and then diluting or concentrating it accordingly.

If you observe the fungus attack in earlier days, baking soda as a fungicide application works as a great natural fungus controller but if the fungus has gotten over the most part of the lawn, then using lawn fungicides is the only solution.

Will baking soda kill dandelions?

Yes, baking soda kills the dandelion weed plants by desiccating them and forcing them to release the body moisture in the outside environment and leaves the plant body dry up. 

The sodium bicarbonate draws water from the plant cells of dandelions and deprives them of much-needed water for growth.

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  1. When I treat my crabgrass will it also kill my grass in my yard.

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