Bonide Weed and Feed contains Viper. Kills dandelions and other broadleaf weeds on contact. Contains premium slow release fertilizer. With iron for deep greening. Contains Vital-X micronutrients. Fertilizer analysis is 16-0-8. This 16 lb bag should be used on 5,000 square feet. Apply evenly with a lawn spreader as a one pass application. A two pass application, criss-crossing the area at half the rate eact time is also acceptable. The suggested rate is 3.2 pounds per 1,000 square feet.