For effective post-emergent weed control, 4-Speed XT Post-Emergent Herbicide Weed Killer delivers quality results quickly and efficiently. This liquid herbicide works to control a variety of broadleaf weeds and grasses in residential and commercial landscapes. It kills tough weeds like spurge and ground ivy and shows results in under 24 to 48 hours. 4-Speed XT is safe to use around pets when it's applied as directed, and it produces weed-free lawns with very little work involved.