The coverage area tells you how many pounds of fertilizer you need for every 1,000 square feet of lawn you're feeding. To determine this, divide the number of pounds of fertilizer you want to use by your lawn size. For example, if you have a 25-pound bag of fertilizer and your lawn measures 15,000 square feet, you will have a coverage area of 1.7 pounds per 1,000 square feet (15,000 / 25 = 1.7).
Your spreader setting is based on your coverage area. Round the number you obtained in your coverage area calculation to the next highest whole number and use this number to find your setting from the list below. In the example, our coverage area was calculated at 1.7. This rounds up to 2.0, so we would set the spreader to 13. The following list details the settings for other coverage areas (coverage area square feet = spreader setting): 1.0 = 11, 2.0 = 13, 3.0 = 14, 4.0 = 16, 5.0 = 17, 6.0 = 18, 7.0 = 19, 8.0 = 20, 9.0 = 22, 10.0 = 23.
The EarthWay spreader can also be used to spread grass seed over a new lawn or to repair an existing lawn with thin patches. Determine the coverage area as you would for fertilizer based on how many pounds of grass seed you have to spread. Then find the settings in the exact way you would for fertilizer. For example, a coverage area of 3 pounds per 1,000 square feet gives you a setting of 13.
EarthWay broadcast spreaders vary somewhat in appearance, but they all function similarly. Before pouring your fertilizer into the hopper, use the lever to close the flow holes on the hopper. Once filled, open the flow holes and walk back and forth over your lawn in overlapping rows. Once you have finished, empty the hopper of any leftover fertilizer and clean the hopper thoroughly to prevent corrosion.