Should check out joint doctor grow guide for autos. It's a sticky in the auto section has everything u need to know.
Here's a little quote on nutrients
"For the first two weeks, I use what they recommend for seedlings.
Then I use the Micro 2+ Light Feeding program for the rest of their life cycle. I usually skip week 3 and 5 to bring it down to a 6 week program which I begin as soon as LRs are sexed.
I know it sounds complicated. Obviously all this is not needed.
As a rule of thumb, treat Lowryders like seedlings for the first 2-3 weeks, then switch them onto a light bloom program. So, you feed them a seedling/transplanting formula the first 2 weeks, then switch to a bloom fertilizer with something like a 5-10-5 or 1-2-1 ratio of N-P-K.
Give them a feeding of bloom fertilizer every week on weeks 3,4,5,6. Just pH-balanced water on week 7. Flushing solution on week 8."
Good luck