i recently mixed some of this and im trying it now. for the azomite and humic acid i just went with down to earth. i just got some random horticulture epsom salt as well. for the sulfate of potash i asked daz on insta but didnt get a response, ended up using a random 0-0-50 fine off amazon, and this for the granular https://www.amazon.com/gp/product/B0056QF79M/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1

fingers crossed lol.