People & Pet Safe when used as directed. Corn Gluten, contains natural ingredients and prevents weeds from growing. Works on annual and perennial weeds. Works on grassy and broadleaf weeds. Works in lawns, around trees, shrubs, ornamentals, flowers and even vegetable gardens. Great for spring, and fall applications. This convenient liquid formulation makes those big messy containers of corn gluten meal obsolete. 1 Qt. treats 1000 sq. ft.