Several questions to my 1st Grow!

So, I just getting start with my 1st grow, and have several questions, this maybe was righted down many times, but this forum is so huge and its hard to find the right answers so I decided to post a new thread and wask them directly to have good and direct answers so here I go:

1st- when I must start with the nutriennts solution?
2nd- Wich is the best values for each stage of grow? (npk values)
3th- Lets say I have my soil at 7,9 PH I must water with an acidic solution to lower the PH of the soil? That's correct? What should I DO?
4th-What about Lightening I can Change from 16/8 to 12/12 all of a suden ? Or I must do this taking a hour per day or so?
5th- The fans must be always on? there are a rule for this? thanks!!

Here some of my questions before I start, If I remember more I will post right in this post!! Thanks a lot!

1,2,3 If your starting out I never fucked around with nutes, you give it to much you will kill them.
4. No, you use 18/6 for about 7 weeks, you switch then to 12/12 so they start budding. 18/6 is for vegging (Leaves growing) 12/12 is flowering (Buds form)
5. Yes leave fans on at all times, it needs circulation just like people on a hot summer day.

what about flushing what this process consist in? can you tell me more about it? thanks!

Hey man
if you look at the stickie threads at the top of the newbie central section, there is some really good information there that should answer most of your questions and give you plenty more info for the rest of your grow!

1) i dont give nutes to babies, i wait til they are 2-3 weeks along before the first nutes.
2) Veg wants higher N, Flower wants higher P
3) if it were me, i would grab some PH adjusting solution, and after making my nute mix, i'd use the PH solution to adjust to about 6.5, then feed the ladies, and then check the run off PH. if the run off is 6.5ish, you are done. if its not, i adjust the solution so that the run off PH is at or very near to 6.5, or 6.6.
4) yes you can do it all of a sudden, or gradually (say -30min per day).
5) fans are important. they help build strong stems for buddy support and they keep the air from getting stagnant while also helping in the fight against mold, fungus, and mildew.


Goodluck!

thanks a lot! And about flushing ?? thanks