Seedsman WW Auto

I'm disappointed with the height of my plants, I'm very happy with their health and fast growth though. My hope is to get three ounces dry after this grow. The total turnaround time from seed to harvest is 13 weeks, allowing four harvests per year. I haven't done any aggressive training on the plants, just light LST and defoliation. I've been using basic nutrients at recommended levels till the Nute Burn Incident (plant 3 is now "CC", Crispy Critter). Since then, I've been diluting the recommended levels with 50 and now 30 percent ph'd water. I'm wondering what went wrong. Possible causes include: - Cold roots? - I used a seedling mat under 1 and 2 till Week 3. The grow tent is 24" above the concrete floor which has an SUV trunk mat and 6 inches of insulation over it. Solution: I reset the electric oil radiator closer to "4" than "3". I moved my thermometer to the floor - it's about 4 degrees cooler on the floor of the tent than at the top. The floor temperature is now 78.