After germination and before first true leaves appear, I feed only distilled water with Superthrive and Maxi-Crop added. As soon as the first true leaves show, I feed a 1/2 strength guano tea consisting of 50/50 high Nitrogen guano and high Phosphorus guano.
After about a week I transplant to 2 liter soda bottles with tops cut off, and filled with my vegetative organic soil-mix. I then move from fluorescents to main vegging light, which is a 1000w MH.