I will be using Big Bud for flowering, should I be using other nutes as well? I'm asking this cos the N-p-k is 0-1-3 and that seems fairly low compared to the nutes I see people using on here.
Thanks in advance!
Yes, you need to start out with a good base nute, not just Big Bud.
I would say that you should start with Grow-Micro-Bloom from AN since that's a pretty reasonable way to begin. And you can change up the concentrations as you see fit. Then you can add in Big Bud and Bud Candy as you like.
If you go to the AN site, then you can find out more about how to mix up the nutes the way they recommend:
http://www.advancednutrients.com
There's a nifty calculator that will help you know the amounts to use, and it's helped me when I was first starting out.
I would just use one product on any grow, IMHO. The more the merrier, I think. I mean, it can only help...if you use them correctly, of course.