Well, taking a chance here. I built a 4x2x4 cab and have one 240w flower light mounted. good airflow, spacious, poor reflectivity on most surfaces to try and lower the intensity of the light a little.. foliar fed with "spray n grow micronutrient" (5%zinc 10%iron). last time I wasn't using cal mag, so I'm feeding with that as well now in the res.

Have my two hydro girls and a coco I think is likely a male.. but otherwise my 3rd most hardy plant. I would prefer to use some more sacrificial plants.. but these guys are the ones that bounced back quick enough and I need to get a harvest on the way..

starting bloom today, using flora grow, going to use equal amounts of gro, micro, and bloom for the first week and shoot for 6-800ppm on the smaller one, 8-1k for the big girl with the calmag added.

hopefully the shorter light span, (18hr down to 12) the iron feeding, and the calmag will make the difference.. if not the box will accommodate a 400w hps with no trouble..

how often are you foliar feeding the iron?