That is what I figured. Online they have the different varieties that I need, but once I get to the COOP I am afraid they won't stock everything. I need 3 bags of 15-15-15, 6 bags of 19-19-19, 2 bags of 20-20-05, 3 bags of just pot ash, and 2 bags of amonium nitrate. I wonder if they will have all of that in 50#bags? Any help would be appreciated.