Crabgrass and Weed Preventer. Contains dimension R, which is used in gardens, and planting beds to prevent growth of both broadleaf, and grassy weeds for long term control. Prevents weed seed from germinating. To be used where weeds are a problem after desirable plants are established for a weed free garden during the growing season. Kills seeds as they germinate. Comes in a shaker. Provides coverage for up to 15,000 square feet.