BONIDE PRODUCTS INC 309 Concentrate Weed Beater, 16-Ounce 16 oz., Concentrate, Weed Beater Plus Systemic broadleaf weed killer for lawn, and turf Effective on over 200 hard to kill weeds, and goes right down to the roots Visible results in just 24 hours Cool weather performance down to 45 degrees Fahrenheit extends application window to early spring, and to late fall, when weeds are most susceptible