Fert-lome DECIMATE WEED & GRASS KILLERDECIMATETM Weed & Grass Killer is a non selective herbicide that kills weeds grass plus some woody plants. This is a contact, semi translocating herbicide that inhibits glutamine synthetase. Works in 24 to 72 hours and works best when temps are over 85. Rainfast in hour to 4 hours. May be reseeded or replanted after the spray has dried. CONTAINS: 24. 5% Glufosinate ammonium APPLICATION: Mix 2oz per gallon per 1,000 sq ft.