Well, this is not my first grow, as always I use homemade organic soil made of:
-2/3 of Compost soil from kitchen and garden wastes
(2 years old now, well decomposed with leaves, grass, small branches etc... )
1/3
-Wastes of Coffee machines collected in restaurants
-woodchips
-horse manure
-goat manure
-grinded eggshells
-wood ash
The only extra nutrients come from diluated urine at 5%, then 10% and later 15% during the last stage of veg.