Let's play around with a hypothetical. If YOU were to plant and walk away from two teenage plants in a secluded outdoor grow spot, what preparations would you take to give them the best chance of survival? Let's pretend that you tested the soil from the spot of which you are thinking of using and it is high in nitrogen but low in phosphorus. You do not yet know the sex of the plants however there are only two. I, personally, was thinking of digging massive holes for each, putting some dead fish at the bottom, adding a layer of soil and then replacing the rest with 1/3 original soil 1/3 foxfarms and 1/3 perilite. I could also throw some high phosphorous ferts in there for when it comes time to flower. Keep in mind that you will be able to give the plants little to no maintenance so they will be on their own. How you can best give them the nutrients they need ahead of time? Go.