vegetive

Hey all, newbie here, I was wondering if someone could tell me is it better to use bonemeal or bloodmeal during the veg stage, and then flowering. How much of a variance can I have in my light cycle. If im off half hour or so in either direction, are there if any adverse effects? Thanks for any...

So this is my closet. these plants are brought to you entirely by LED's, since seedling. they have been around since may, but I got them late june. they had traumatic childhood... broken mainstems from falling lights, small pots, insufficient food / care.... but I have been nursing them back...