Bicarbonate: How To Make It An Ultra-efficient Natural Weed Killer?

Baking soda is usually used to remove dirt throughout the home. However, this eco-friendly cleaner can also be very useful in the garden or vegetable garden! It can be used to treat a yellowing lawn, fight mildew and invasive aphids. You can also use it to maintain your garden furniture. But above all, we do not always know that it is an excellent herbicide. However, if used properly, it can free you from the chore of manual weeding for weeds (bindweed, quackgrass, nettle, dandelion…). No more need for chemicals that are bad for the environment! Discover how to use your bicarbonate as a natural weed killer to chase away unwanted plants from your plantations.

Why rely on it?

Just like mixtures based on boiling water (cooking water, salt water), coarse salt, dishwashing liquid, acetic acid (white vinegar) or black soap, bicarbonate is an ecological, biodegradable and very economical weedkiller. It will be the undeniable ally of gardeners who have banned the use of pesticides and other chemical plant protection products (fertilizers, pesticides, herbicides such as Glyphosate, etc.) in their outdoor spaces. Without danger for our health or that of our pets, it can be used without risk on all surfaces to eliminate weeds: gravel, patio tiles, walls … You do not risk damaging them! Properly applied, it also poses no risk to surrounding vegetation.

It is however necessary to respect the dosages well to drive out the undesirable grasses in a very effective way. It becomes phytotoxic (toxic for plants, and thus the weed) only above 1% in concentration.

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How do you use your bicarbonate as a weed killer?

What you need:

Baking soda for food (in the salt aisle) or pharmaceutical baking soda (more expensive, in pharmacies).


1) Schedule an application when the weather forecast calls for several days without inclement weather. Rainfall may dilute this natural product too much, making it ineffective. The morning dew will be more than enough to release its active ingredients to remove weeds.

2) Sprinkle your bicarbonate on the areas to be treated. In terms of quantity, count 20 g/m2 of water. Avoid the plants you want to keep: flowerbeds, lawns, flowerbeds…

3) Then let time do the rest. The weeds will disappear as time goes by. Repeat the operation once or twice a year.

That’s it! You now know how to control weeds in your garden paths. There are other solutions, of course (nettle or angelica manure, mulching, false seeding, elbow grease to pull everything out by hand…). Nevertheless, there is no doubt that bicarbonate is one of the easiest, most accessible and ecological solutions for the planet! In any case, no need to buy chemical weed killers anymore.