My nana swears by this DIY weed killer recipe. Here’s how it works

The effectiveness of Nana’s weed killer lies in the synergy of its three ingredients. Vinegar, specifically white vinegar with 5% acetic acid, acts as the primary weed-killing agent. Its acidity is strong enough to damage and kill the leaves of weeds upon contact.
Salt, or sodium chloride, is added to enhance the mixture’s effectiveness. It dehydrates the plant, preventing it from absorbing water and nutrients. This makes it particularly effective on stubborn weeds that are resistant to vinegar alone.
Dish soap serves as a surfactant, helping the solution adhere to the leaves of the weeds. This ensures that the vinegar and salt can penetrate the plant’s surface more effectively, increasing the overall potency of the mixture.