I am assuming you meant "organic outdoor soil". Go look up some "super soil" recipes for ideas. Or check the organic boards here and search for some threads on soil mixes, lots of good soil info to be found there. Any good organic bagged soil can be used as a base, but some come with more pre mixed ingredients than others. Here is a list of things you can add to your soil, maybe not all of em at once though lol.
Alphalfa meal, cotton seed meal, corn gluten meal(stops seeds from germinating +N), kelp meal, neem meal, flax seed meal, rice hulls, comfrey(amazing plant to use for fert look into it), bat guano, bone meal, crab meal(also kills some pest insects), feather meal, leather meal, crushed oyster shell, earthworm castings, fish meal, fishbone meal, sea bird guano...just a few useful things
keep in mind you have to let you soil sit and "cook", or compost itself for a good 3weeks to a month after mixing so all that organic goodness can breakdown into something the plants can use efficiently. And chemical ferts ruin organic soil... Duh! Make sure you add some mycorrhizae in your soil too, and look into adding in minerals to soil as well with rock phosphates, green sand, glacial rock dust, and similar things..... soil is a complicated thing man.
Hope some of that helps and you can make some nice big buds under the sun!!!
HUMAN GUANO lol 
