ok so i'm plannin my grow for next spring and i found a pretty good spot. a clearing in some local woods. after hackin down around six inches of grass i finally got to the soil, so i cultivated around 25 patches about a foot apart in a 5X5 grow patch. givin my situation i can't lug any soil to my grow area so i was wondering what are some good ways to tell if the soil already there is good enough to grow some buds?