BukDat did a little research and seem's your best bet would be to go to the place called Lowes thats in the state's .They seem to have a much greater selection of dirt. As for the N-P-K for soil.I got no clue .I look at what is all in the dirt .For example the dirt i buy i look for Canadian sphagnum peat moss, perlite, vermiculite, charcoal.But wait for someone who actually look's at the N-P-K In soil