Vinegar contains acetic acid, which damages the outer surfaces of plant leaves. When sprayed directly onto weeds, it removes moisture from the plant tissue and causes visible wilting.
Kitchen Salt
Salt is one of the strongest ingredients in the mixture. It interferes with a plant’s ability to manage water, leading to severe dehydration. This can make it difficult for weeds to recover after treatment.
Citric Acid
Citric acid, commonly associated with citrus fruits, increases the mixture’s effectiveness by further damaging plant tissue when it comes into contact with leaves.
Liquid Dish Soap
Many plant leaves have a waxy coating that causes liquids to slide off. Dish soap helps the spray stick to the surface of the leaves, allowing the other ingredients to remain in contact with the plant longer.
Although these ingredients seem simple, the way they work together may surprise you.
Before mixing your first batch, it helps to understand what this solution can—and cannot—do against stubborn weeds.
How the Mixture Actually Works
Many people assume this homemade spray completely destroys weeds from root to tip. The reality is more complicated.
This mixture works primarily as a contact treatment. In other words, it damages the parts of the plant that it directly touches. Leaves and stems often begin to dry out quickly after application, especially during hot weather.
However, deep root systems may survive the initial treatment. Perennial weeds with extensive underground structures can sometimes send up new growth even after the visible parts have been destroyed.
This is why repeat applications are often necessary. Each treatment weakens the plant further, eventually exhausting its ability to recover.
What You Need
To prepare this homemade weed-control solution, gather the following ingredients:
300 milliliters of water
1 tablespoon citric acid
200 milliliters white vinegar
1 tablespoon kitchen salt
1 tablespoon liquid dish soap
1 additional liter of water
