1st coco with CMH 315W light

Finally started the flowering phase, and so far they look green and healthy. I did a bit of cleaning of the lower branches aswell as I had to LST the Grapefruits and 2 of Blue Dreams, in order control their sativa genetics, as to try and keep the canopy as flat as possible, the other 2 Blue Dreams look like they're having some problems, like over watering or a nitrogen intoxication? Even thought I started with the flowering base nutrients, I'm giving them more from the A base, to try and help them have a good stretch, for the rest I'm going half the recomended dose.