I 've heard that if you change the lighting to MERCURY VAPOR (the more red or pink of the spectrum as opposed to blue) also the soil content goes down (or up) someone correct (please) from 15-30-15 to 15-20-15
The rest is family recipe time.
Batguano
Fish Emulsions
Egg Shells

I wish you luck, since you have come this far, you don't want to lose it. But you MUST SEX your plant. Make sure it is FEMALE other wise NO BUDS. But you can cross pollinate if you bring some females into the grow room.
The best way to tell is by looking at the branches and if it has some tail.... it is probably female.imp: :rasta: :stoned: