I use a base of blood meal, bone meal, and iron supplement. Then i start of from there. Mix it with soils i've accumulated from other plants, then mix in some natural soils i have around my area. If i'm lucky enough and hit the coast line, i also grab kelp, shell (which i crush), also use cow manure sometimes, really just depends on what i can get my hands on as of late. Think this batch with this one, was the same base but i added coffee grounds, egg shell, sea shell crushed. Every mixture is a little different....