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.
Optional Add-Ins for Specific Situations
Citrus essential oil (10-15 drops): Contains d-limonene, which can boost herbicidal activity and smells great.
Boiling water: For immediate scalding of weeds in pavement cracks (use alone or before applying the vinegar mix).
Step-by-Step Instructions: Mix, Apply, and Maintain
1. Prep Your Space (Safety First!)
Put on gloves and eye protection, especially if you’re using stronger vinegar. Cover nearby desirable plants with cardboard or a tarp—this solution is non-selective and will harm any plant it touches.
2. Mix the Solution
In a large bucket or sprayer, combine:
1 gallon white vinegar
1 cup table salt (skip if treating garden soil you plan to reuse)