when i transplanted out of the grow box i ran out of potting soil, so i went into the woods and dug a 5 gallon bucket out and finished transplanting w/ it. (i was trying to acclimate outside before moving to permanent spot). anyway, one of em that i put in str8 from the ground dirt did better then any of the others in the potting soil. i've found on here and thru exp. that a good dark soil usually is a good soil to plant in. and i'd say it's safe to assume the farmer knows his shit about where he's growing. after all, that's his bread and butter! lol