Ben from Pflugerville, Tx writes
Solo 421-S Portable Spreader settings may vary depending on how fast you walk. If you need to use 3.6lbs of product per 1,000 sq ft you would add 3.6 lb of product to spreader, start with a medium setting, then apply product to a 20 x 50 ft area (1,000 sq ft). If you have product left, your setting is too low. If you run out of product, your setting is too high.
Answer last updated on: 08/01/2017