How Do You Kill Crabgrass with Vinegar

This all-natural method to kill crabgrass is a great option that won’t cause lasting soil damage. Simply spray the vinegar (5% acidity or higher) on the weed until it’s drenched. Repeat a few times over the course of several days to a couple weeks, or until the crabgrass dies.

How long does it take for vinegar to kill crabgrass?

Vinegar kills weeds quickly—usually within 24 hours—but does not discriminate between the weeds you want to kill and the plants you want to grow, so apply the vinegar carefully and in the right conditions. Vinegar’s efficacy depends on the weather and the solution’s concentration.

Will vinegar and soap kill crabgrass?

Spraying crabgrass with vinegar containing about 5 percent acetic acid will kill crabgrass and keep it away for up to 13 weeks, found Cornell University. They also concluded that the highest concentration of acetic acid (20%) gave better control than lower concentrations.