The recommended settings for common grass seed spreaders are 3.5 and 6.5 for broadcast and drop designs respectively, but the ideal setting depends on the manufacturer’s recommendations and other factors unique to the project. The condition of the spreader, pace of walking and soil humidity affect the setting you should use on the spreader.
The most common grass seed spreaders have similar settings, which are computed for the average walking speed, normally 3 feet per second. Broadcast and drop spreaders have different configurations and require different settings.
Manufacturers provide recommended settings for their spreaders on the label on the product or in its manual. Such settings are tested and often come with additional information and tips on how to achieve the best results. Most manufacturers’ websites offer freely accessible recommended settings for their models of grass seed spreaders. Some retail outlets also provide settings for spreaders on sale.
Manufacturers may use an average walking pace when calculating the ideal setting for a grass seed spreader, but you need to consider any significant variations in the speed. The setting also changes as the spreader ages or if it is poorly maintained. The conditions of the soil also affect the setting. Test several settings, starting with the manufacturer’s recommendation.