Concern Weed Prevention Plus is for use in flower gardens, vegetable gardens and in landscaped areas around trees, shrubs and ornamentals. Ideal for use under bird feeders. Easy to use resealable shaker bag. Up to 90% effective weed control in the first year on dandelions and crabgrass. Safe for children and pets immediately after application. 5 lbs covers 300 sq. ft. Contains 100% corn gluten meal.