natural earth conditions
 

Considering the fact I've started an outside crop, under natural earth conditions, Im wondering what
to expect of it's quality. Adequate? Shit? What?

As long as you add the correct chemical or organic fertilizers to that natural earth and don't forget to adjust the pH for the kind of plants you want to grow. Try them time release fertilizing pellets They save you a lot of work.
You then should be able to grow some pretty adequate shit.
Ron