Another equally effective method to kill weeds is to spread salt directly onto the weeds or unwanted grass that come up between patio bricks or blocks. Vinegar and dish soap will also work and you can make a homemade weed killer out of these cheap ingredients.
You only need a few drops of dishwashing liquid so the brand doesn’t matter. The purpose of the soap is to break the surface tension of the vinegar so it sticks to the weeds, forcing them to absorb it more readily.
1. Heat vinegar in a pan on the stove until it is hot, but not boiling. 2. Add Epsom Salt and stir in with a wisk until it is dissolved. Let mixture cool slightly so that it is still warm but cool enough to handle. 3. Add Dawn Dish Soap to your sprayer and slowly pour in the vinegar mixture.