N-P-K question

[The9rideNblack]

which element is good for seedlings, vegetative growth, and finally flowering?

[rnf232s]

I wouldnt recommend using ferts with your seedlings. For the vegitation stage it is good to have an equal amount of N-P-K. Peters is a good all around soil that is 20-20-20. For flowering you need a higher amount of P than the N and K.