plants are tall but the leaves turn yellow and fall off but ONLY when they go into Flower stage. When in Veg they love life. After about 2 - 3 weeks in flower the leaves quickly turn yellow and fall off. Leaving only the tiny leaves on the buds and even some of them are brown. So I checked PH and it was low. So I threw some lime on the soil. I used Miracle Grow soil and it releases nutrients by watering (Time release). Its been about 5 months and the soil is loosing its nutrients (FINALLY because MC is WAAAYYY to strong for them.) So now I am finishing a flush of the soil with PH's water of 7, added lime. Then I looked at my thermometer. and it said 85, but that was far away from the lights. So I hung it higher up near the lights and I was getting 97F+. So I raised the lights, added another exhaust fan and now near the lights are at a comfey 85. So 3/4 of the girls in the tent are singed (not dead and buds are nice size (But could be as wide as a coke can, had I not screwed up with the Soil, heat and PH) It wasn't happening immediately when I got the MC soil because I would only water ever 4 days or so, so the nutrients from the soil was not so strong,once I had to go to every 2 days the Nitrogen in the soil (I think) was too much and started burning the leaves. then they would turn yellow and then brown and crispy and fall off.