Unfortunately, we do not have the spreader settings for that specific combo and the manufacturer does not list that spreader on their bag of Ferti-Lome Broadleaf Weed Control with Gallery. Due to there being thousands of granules on the market and just as many different types of spreaders, you will want to calibrate your spreader to the product you are using and its application rates. You can see a short video on how to accomplish this below.
How to Calibrate your Spreader
Unfortunately, Ferti-Lome Broadleaf Weed Control with Gallery is not labeled to treat Pennsylvania Smartweed.