you can put them into flower (12/12) as soon as they have a good root structure. it is all dependent on what you are going for. do you want only a few, big plants? or lots of small? do you want to harvest more or less?

keep in mind that your plants (depending on strain, etc) can stretch 1/2 to 2/3 once you put them into flower.

i used MG ferts for veg on my first two batches wihtout any problems. people are gonna recommend that you get something else. i just got all of my fox farm nutes so i'm curious to compare. you want something high nitrogen and low potassium and phosphorus, and low in nitrogen and high in potassium and phosphorus for flower.

-shake