A group shot with fluoros and HPS just coming on, Blueberry in the foreground, a pair of Northern Berry in the back, at 4.3 weeks of flowering
the verdant flush of Nature's bounty
I believe that the cannabis plant will tell you what she needs, as long as you can read the signs. One of the things I did wrong in my previous grow was to follow watering and fert regimens and schedules too closely, ignoring signs that would have led me to change the regimen. I underferted severely, slowed vegetative growth and the yields were more than disappointing off of 3 plants.
This pic is an example of reading the signs for the better. There are only 3 plants in there, and, you do not see the full canopy. The HPS makes for funny effects in lighting, making the leaves looking brown and/or yellowing. I assure you that was not the case.
Note the lush growth with very little, if any, signs of fert burn even though I ferted everyday since 2 weeks after germination. I used worm castings (WC) in soil-less mix (4:3:2 Promix B:Vermiculite:WC) for this grow. I would wait until the plant was just about to wilt from dryness, watered with pure water right before before I fert with 3/4 strength nutes with Thrive Alive (TA) or Superthrive (ST). Wait until plant is about to show signs of wilt, then the next watering was only with 1/2 strength nutes with TA or ST. Then repeat. I did not apply this regimen with every watering, though. Sometimes the growth seemed to slow considerably over a day or two, so I would apply pure water and 3/4 nutes even if I had just done it previously. If the leaves started to curl up or become too dry to the touch, I would immediatley do a pure water watering followed immediately with 1/2 nutes with ST or TA.
Seems to have worked well with these two strains in both vegetative and generative growth stages