Shake well before using. Prime Source Turf Marker Blue application rates will vary depending on turf color, turf height, and spray application rates. For optimal rate application, experiment with the volume of spray solution and rate of Prime Source Turf Marker Blue to find a rate that is functional and economical. Suggested rates: 16-24 ounces per 100 gallons (190 mL per 100 liters) of spray solution treated. For smaller spray applications using backpacks and small sprayers, use 2-3 ounces per 3 gallons (50-75 mL per 10 liters).