Broadleaf weed killer for lawn and turf. Kills weeds right to the roots. Visible results in 24 hours. Rain fast once dry. Treated area can be reseeded in 2 weeks. Cool weather performance down to 45 degrees fahrenheit. Extends application window to early spring and to late fall, when weeds are most susceptible. Active ingredients MCPA, Mecoprop-p Dicamba and Carfentrazone.