1st Scrog-Blue Dream with Timber COBs

Girls are exploding in growth, but not growing vertically as much as I had hoped. Buds are stacking…beginning of week 4 is looking good. By the end of week 4 here, the flowers are getting slightly larger but not taller. This is Blue Dream….as a Sativa leaning strain should she be stretching more? The good news is that I won’t need my traditional bamboo sticks to hold up the colas. I decided to install a 20”x48” heat mat to see if I can bring the temps up slightly at night. It turns on when the tent drops below 71 degrees. I also keep my plants in saucers with plant elevators, so my roots won’t be sitting directly on the heat mat. I don’t want to overheat and cook my roots. Added a humidifier to the lung room to raise the humidity from 39% to 45%. Feeding details by day below. 10/16. 4 gallons fed. Fed 5g/gallon of MegaCrop and 3ml/gallon of CalMag. Water at 6.5ph and 1100ppm. Runoff ppm 1600. 10/17. No feed….pots still heavy from yesterday 10/18. Fed 4 gallons, vacuumed 1.25 gallons from saucers. Net, they were thirsty. Feed was 950ppm and 6.5ph. Runoff at 1500ppm. Maintaining VPD at 1.3-1.5 during lights on. Vpd around 1 during lights off. Ordered a new woozoo fan to improve circulation below the canopy. Will install tomorrow. 10/19. Fed 2.5 gallons of RO water and tap water with CalMag, 350ppm feed. 1400ppm runoff. 10/20. I fed straight water yesterday, and I saw a big improvement in runoff ppm today. Today I fed four gallons of MegaCrop at 5g/gallon plus CalMag . Ppm of feed was 1100. Ppm of runoff was 1150. I believe that I will continue to alternate watering (No nutes) and feeding nutes unless I see a deficiency pop up. I also added two fans to the tent. A Woozoo multi oscillating fan under the canopy and an oscillating pole fan on the canopy. The fans are programmed to run at faster speeds when canopy temperatures increase. 10/22. 4 gallons of MegaCrop at 3g/gallon, Bud Explosion at 1g/gallon. Feed ppm at 1050 ph at 6.7. Runoff ppm 1425.