The spreader setting depends on the spreader, such as a 5 for the Black Beauty Ultra. The correct spreader setting allows the spreader to apply the correct amount of fertilizer without damaging the lawn through overfeeding or underfeeding.
JonathanGreen.com provides users with a wide variety of spreader setting configurations for different types of spreaders, such as the Fast Grow Mixture and the Full Sun Mixture. To use, individuals simply find a fertilizer and follow the necessary prompts for their unique situation. Additionally, many fertilizer and pesticide brands provide users with recommended settings on their products' labels, which is a good place to begin calibration.