When weeds becomes a problem, it's time to send in Green Gobbler. Our 20% Vinegar Weed Killer gets rid of weeds, dandelions, crabgrass, moss and other perennial weeds. Green Gobbler 20% Vinegar Weed Killer is a non-selective herbicide derived from corn. Our formula is an OMRI-listed weed killer and approved for organic use. That means you can control weeds and grasses without using chemicals like glyphosate, bleach or chloride. It's perfect for use on driveways, sidewalks, concrete, mulch beds, pavers, flower beds, parking lots, farmlands, barns and more. For best results, use this Green Gobbler Weed Killer in dry conditions, and when there is ample sun exposure.