Killing weeds in your rock driveway can be a time consuming and costly chore. Fortunately, you can use a homemade weed-killing solution instead of purchasing costly weed-killing products at the store. Each homemade solution has a different way of killing the weeds in your driveway.
Fill a spray bottle full of vinegar. Spray a generous amount of vinegar onto the weeds in your rock driveway that you would like to kill. As the vinegar soaks into the weeds, it will draw the moisture out and cause the weed to dry up and die. The stronger the acidity of the vinegar, the quicker it will kill the weeds.
Boil a pot of water and pour it over the weeds in your rock driveway. The hot water will cook the weeds and cause them to die. If the weeds do not die after the first application, repeat this process once a day until the weeds begin to die.
Put a small amount of salt at the base of each weed in your rock driveway that you would like to kill. After the salt absorbs into the soil, it will prevent the weeds from absorbing water and cause them to dry up and die.