what about ferts? what is a good time to begin using them?

and what would be a good fert cycle?

this is my first time doing this so all the detail the better.

as a first timer...if you can tell me things i should look out for while the plants are vegging that would be great. (yellow leaves, wilting, etc.)

Good things and bad things that i can notice with the plants would be very helpful.

btw thanks gagrown.