I have a few questions on the stuff :P

1. Can you accidently put to much in the galon of water?
if so, is it soemthing you need to be worried about
2. I use the bloom til they start budding, and then switch to the grow correct?
3. Its all organic, should i get an all organic earthworm casting/bat guano soil to go with it? if i dont will it matter much?
4. How often should i use/how much should i use? whats on the back of it or something special for the ocasion?
5. what PH range should my plants be in? one is 7in, 9in, 13 in.
thanks!