Here are the instructions that come with/from EarthBox. They say you need to add one pound (1#) dolomite lime initially, and then each year after as well.
Here's the link:
https://earthbox.com/earthbox-pdf/EB...IONS_NEW-2.pdf
According to Espoma, their garden lime, which is pelletized, equals 1 1/3 cups to 1 lb.
According to a conversion site, pulverized lime equals 1 cup to .38 lb., so therefore
1 lb. equals 2.6 cups.
Not sure about the difference in uptake between the pelletized and the pulverized.
I used the pulverized stuff from my local ag. store, which sells a 50# bag for under $5.
They have the pelletized stuff also, that's priced at about $6 for 50#.
Either is cheaper than Espoma, but depends on how much you need.