Over-The-Top II Grass Killer is safe for gardens & shrubs! Pick up an 8 oz. bottle at MRT Lawn & Garden Center. Formulation: Poast Absorbed by Foilage and Travels Through Entire Plant Will Slow or Stop Growth Within 2 Days Controls Annual and Perennial Grass Weeds. Systemic selective broad spectrum post-emergent herbicide that can be sprayed over desired plants listed to control annual and perennial grasses. Can be used on vegetables, gardens, trees, shrubs, ornamentals and ground covers. Stops growth of weed grasses within 2 days.