Extended Control Weed Preventer contains Snapshot which provides weed control for up to 6 months. Controls more weeds than regular Preen. Safe for use around over 345 shrubs, 126 types of ground covers and perennials, 99 types of trees, and 35 nonfruit/nut-bearing trees. Not for use on lawns, vegetables, or certain annuals and perennials specified on the label. 4.93 lbs. covers 805 sq. ft, 10 lbs. covers 1,630 sq. ft., and 13.75 lbs. covers 2,245 sq. ft.