Preen Extended Control Garden Weed PreventerProduct Description Preen Extended Control Garden Weed Preventer Ingredients Key Features 1 application blocks weeds up to 6 months guaranteed When used as directed Preen Extended Control Weed Preventer can be used around more than 600 perennials, groundcovers, shrubs Flip top applicator cap makes it easy to apply Not intended for use on flower seeds, lawns, vegetable gardens, water gardens or other food producing or edible plants Covers 3,500 sq. ft.