Aside: I'd like to know more about the critters within terra preta. https://en.wikipedia.org/wiki/Terra_preta#Microorganisms_and_animals https://en.wikipedia.o

Aside: I'd like to know more about the critters within terra preta. https://en.wikipedia.org/wiki/Terra_preta#Microorganisms_and_animals https://en.wikipedia.org/wiki/Terra_preta#Microorganisms_and... Our volunteer group is creating new urban forests. Digging out invasives and planting natives. Our soil is terrible. Glacial till (?) and gravel. In addition to mulch and soil treatments, someone suggested transplanting some dirt from healthy forest areas. Maybe there's fungus, bacteria, or whatever, that will help our new plants. Couldn't hurt, right?