Some weeds are harder to kill than others. With Strike 3® herbicide, tough weeds don't stand a chance. It contains three active ingredients to kill the most hard-to-control weeds on a variety of turfgrass sites and noncrop areas. It can even be mixed with certain fertilizers to promote healthy lawns while killing the weeds. When annual and perennial weeds invade the lawn, Strike back with Strike 3 weed killer.