Liquid lawn weed killers are available in several types to address different weed problems and lawn care needs. Selective liquid weed killers target broadleaf weeds such as dandelions, clover, and plantain while leaving desirable turfgrass unharmed, making them ideal for established lawns. Non-selective liquid weed killers eliminate all vegetation they contact and are commonly used for spot treatments, edging, driveways, or preparing areas for reseeding. Pre-emergent liquid weed killers are applied early to prevent weed seeds from germinating. Post-emergent liquid weed killers control weeds that are already growing and are absorbed through foliage for fast, effective, and targeted results.