Athosanswered grow question 6 years ago Height is over rated. What you want is an even canopy; that been said, the stretch will pick up its pace during the 2nd week of flowering. Now lights, your grow space is 60*60 (4 sq ft) for LED lights, you need between 30 to 40 watts per sq ft, in this case 150 watts puts you at 37.5 watts / sq ft, so I don't recommend more light, but if you can get away with it, get the lights closer, that will certainly help the plant, as long as the temperature at canopy level is appropriate; keep in mind that getting the light closer increases the intensity of light dramatically for the plant. Since you are using a soiless media, I would add some form of cal / mag additive, just enough to get 0.5 EC (250 PPM) as a base water (0.5 to 1 cc per liter should do, depending on your water EC/PPM). Also up the biogrow to 2 cc/lt and start adding bio-bloom as soon as you see the first flowers (2 cc / lt should do for starters).
