Thanks to its low cost and multiple benefits, bicarbonate is a highly valued resource for those who care for indoor plants in flats or offices. Bicarbonate of soda is not only used in the kitchen or for cleaning the house. It is also a silent and effective ally in the world of home gardening. Adding bicarbonate to indoor plants can improve them and enhance their growth, provided it is applied correctly.
What is bicarbonate used for in plants?
Bicarbonate of soda, because it has antifungal properties, acts as a natural barrier against pests and fungi, which are common in humid and closed environments, where indoor plants usually live.
It also helps regulate the pH of the substrate, preventing it from becoming too acidic, which could affect the absorption of essential nutrients.
Among its main benefits, gardening experts highlight that:
- It prevents the appearance of fungi, such as mildew or powdery mildew, which cause white or powdery spots on leaves and stems.
- It reduces the presence of insects, such as aphids and scale insects, which affect the sap and weaken the plant.
- It neutralises odours and bacteria in the soil, especially in pots that are watered frequently or do not have good drainage.
- It improves the overall vitality of the plant, if used in moderation.
How to apply bicarbonate to plants correctly
There are several safe and effective ways to apply bicarbonate to indoor plants:
As an antifungal spray: Dissolve one teaspoon of bicarbonate in one litre of water and add a drop of mild detergent. Then spray on the affected leaves once a week, preferably at times when there is no direct sunlight.
Sprinkled on the soil: Place a small amount directly on the substrate, around the stem, to prevent the appearance of fungi at the base.
As a pot rinse: It is also used to wash empty pots before replanting, eliminating possible harmful residues.
Precautions to take into account to keep your plants looking magnificent
Although baking soda is natural and safe, excessive use can alter the soil’s balance or cause mild burns to the leaves. Therefore, it is recommended that you:
- Do not apply more than once a week.
- Avoid direct contact with flowers or very young shoots.
- Test on a small part of the plant first, before using it more widely.
