nutrition for vegetation

What kind of nutrition should I use for vegetation and what kind for flowering?

Anything high in nitrogen since that's what they need during veg . Your NPK ratio should be a -3-2-1 roundabout . Your bloom nutes will change in 12-12 light .

More like 2:1:3, or even 1:1:1

What makes you think 3-2-1 is a good ratio for veg? You think vegging plants like low K?