1 gallon white vinegar (5% acidity or higher): The acetic acid draws moisture out of plant tissues, causing them to dry out and die.
Why it works: Studies show vinegar with 20% acidity is most effective, but standard 5% household vinegar can work on young, annual weeds with repeated applications .
Substitute: Horticultural vinegar (20-30% acetic acid) is more potent but requires serious safety gear—gloves, goggles, long sleeves. Not recommended for casual use.
1 cup table salt (sodium chloride): Salt dehydrates plants and disrupts their ability to absorb water.
Use with caution: Salt persists in soil and can prevent any plant growth in treated areas. Best for cracks in driveways or patios where you don’t want anything to grow.
Substitute: For garden beds where you plan to replant, skip the salt and rely on vinegar + soap (see variations below).
1 tablespoon liquid dish soap: Helps the solution stick to waxy weed leaves instead of rolling off.
Tip: Use a basic, biodegradable soap without degreasers or added moisturizers.