El vinegar It's much more than a culinary ingredient or a household cleaner. In the gardening world, its use has sparked great interest due to the variety of functions it can perform. From adjusting the pH of the substrate to acting as a natural cleaner, to its use as herbicide and pest repellent, vinegar is one of those multipurpose products that is essential for anyone who wants to keep plants healthy and problem-free with natural and affordable resources.
Why use vinegar in plant care?
The benefits of vinegar in gardening come mainly from its natural acidity (acetic acid), which gives it antiseptic, cleansing, antifungal, and repellent properties. Its low cost and easy availability make it the perfect ally for both beginner gardeners and master gardeners.
Not all plants benefit equally from vinegar.Its use should be cautious and only recommended in certain circumstances and species. Before adding vinegar to irrigation water or using it on your plants, it's essential to know when, how, and, above all, in what type of plants It is safe and beneficial.
Benefits of vinegar in gardening
- Regulation of soil and irrigation water pH: Vinegar has the ability to lower soil pH, transforming alkaline substrates into more acidic environments. This benefits species. acidophilic such as hydrangeas, azaleas, gardenias, rhododendrons, blueberries, camellias, or certain varieties of ficus. Simply add a tablespoon of white vinegar per liter of water and apply occasionally to improve the absorption of nutrients such as iron and manganese, essential for intense green leaves and flowering.
- Hard Water Neutralization: In areas where tap water contains a lot of lime, adding a few drops of vinegar to irrigation water helps reduce hardness and releases essential minerals, helping plants properly absorb nutrients.
- Extra iron contribution to the substrate: White and apple cider vinegar promote iron availability in the soil, which is essential for preventing chlorosis (yellowing leaves) and for vigorous growth in acidophilic plants. Small doses of vinegar improve the absorption of this mineral without resorting to chemical fertilizers.
- Better seed germination: Acetic acid softens the seeds' tough outer layer. Soaking the seeds overnight in water with five to six drops of vinegar facilitates germination and strengthens the seedlings.
- Antifungal and antibacterial action: Vinegar is a natural antiseptic It prevents and controls the growth of fungi such as mold and helps keep leaves free of bacteria. Spraying a diluted vinegar solution (two tablespoons per three liters of water) on the affected areas is one of the preferred eco-friendly alternatives to chemical fungicides.
- Organic herbicide and weed desiccant: Applying pure vinegar directly to weeds helps eliminate them without affecting the health of the soil. This is an ideal method for paths, between paving stones, or areas where other plants don't grow, as the acidity can be too harsh for ornamental plants or grass if used undiluted.
Other practical uses of vinegar in the garden
- Cleaning and disinfecting tools and pots: A cloth soaked in vinegar removes limescale, bacteria, and fungi from terracotta pots or gardening tools, preventing the transmission of diseases between plants.
- Removes watermarks and limescale: Whether on vases, pots, or leaves, vinegar is excellent for removing whitish stains caused by limescale and minerals present in hard water.
- Extend the life of cut flowers: Mixing two tablespoons of white vinegar and one teaspoon of sugar in a vase of water helps keep flowers fresh and beautiful for longer. The vinegar fights bacteria, while the sugar nourishes the stems.
- Keep pets away from flower pots: The unpleasant aroma of vinegar acts as a natural repellent for dogs and cats. Soak cloths in vinegar and place them near plants to prevent damage from curious pets.
- Traps and repels pesky insects: Due to its scent and acidity, a mixture of vinegar and water in a spray bottle, or small containers near plants, helps repel ants, aphids, slugs, and snails without resorting to toxic formulas.
When and how to water plants with vinegar?
Using vinegar to water plants is safe and effective. only in specific casesConsider these aspects before incorporating vinegar into your gardening routine:
- Alkaline soils or acidophilic plants: Vinegar provides extra acidity. It's especially useful for hydrangeas, camellias, gardenias, azaleas, blueberries, and roses, which grow best in acidic soil.
- Irrigation in hard water areas: Adding vinegar softens the water and allows plants to better absorb essential nutrients.
- Control of fungi and minor pests: Spray diluted vinegar on the leaves or substrate, preferably at dusk to avoid sunburn.
- Stimulate germination: Soak seeds in a few drops of white vinegar to break down their coating and facilitate seedling emergence.
How to use:
- Always dilute vinegar in water. Use one tablespoon per liter of water and apply only occasionally—every 3-4 weeks—to acidophilic species.
- makes a pretest on a small area of the plant to make sure it tolerates the vinegar.
- Do not apply vinegar during peak heat or strong sun exposure to avoid foliar burns.
- Do not use vinegar excessively or continuously to avoid serious alterations in the chemical balance of the substrate.
Plants compatible and incompatible with vinegar
- Compatible: Hydrangeas, gardenias, camellias, azaleas, rhododendrons, blueberries, roses, ficus elastica, strawberries, lemon trees and plants that appreciate acidic soils.
- Not compatible: Mediterranean plants, succulents (except for very occasional watering), delicate indoor plants, most soft-leaved green plants or species sensitive to sudden pH changes.
Risks and precautions when watering plants with vinegar
Although vinegar has many beneficial uses, improper use can cause serious problems in plants.
- Root damage: Excessive acidity burns and destroys roots, making it difficult for them to absorb water and nutrients. Damaged roots can lead to plant death.
- Burns on leaves and stems: Spraying vinegar undiluted or during sunlight hours may bleach, stain, or necrotize leaf tissue.
- Nutrient imbalance in the substrate: Frequently applied vinegar alters the natural balance of minerals in the pot or soil, potentially causing deficiencies or toxicities, especially in non-acidophilic plants.
- Elimination of beneficial microorganisms: The acidity of vinegar can reduce the population of healthy microorganisms in the substrate, which are essential for the natural nutrient cycle and overall health of the plant.
- Irreversible damage to sensitive species: Avoid use on delicate indoor plants or on plants with fine or shallow roots.
What type of vinegar is best for your plants?
There are several types of vinegar, although the most commonly used in gardening are:
- White vinegar: Of greater purity and concentration (4-7% acetic acid), it is commonly used for cleaning, acidification and weed control.
- Apple vinager: It provides a milder acidity and also micronutrients such as potassium, ideal for light acidification tasks, for cut flowers, or as a natural repellent.
- Wine vinegar: Less common, its use is similar to that of apple, although it may leave more residual odor.
It is preferably recommended White vinegar to acidify the substrate, clean and remove minerals, and apple cider vinegar for applications on flowers or as a less aggressive repellent.
Extra tips and tricks to make the most of vinegar in your garden
- Vinegar as a degreaser and scale remover: Easily cleans limescale buildup from watering cans, flower pot saucers, and other garden objects.
- Vinegar to keep ants and other insects away: Prepare one part vinegar and one part water and spray ant access points or trails. If there is an infestation, apply several times a week.
- Boosts flowering: Controlled acidity helps hydrangeas and other acidophilic plants develop intense and long-lasting blooms.
- Vinegar as an ecological solution: Unlike chemicals, it is safe for homes with children and pets, as long as it is diluted and used correctly.
