CBD fix auto: 1st grow

Start of the second week since I put the seed in germination (remove 4 days for sprout) Still morning at the window in full east (morning is still <10C) and afternoon outside full south. I put the plant In at 8pm and put a small 14w red/blue led until 4am to mimic a cheap 20/4 cycle. I seems to work pretty well for now I start the terra grow at less than half of the plagron recommandations Day 17: the sky was covered but still get a pretty good ppfd (~1000) and the temperature goes down to 16 during the afternoon and 12 when I put the plant inside at 8PM. I hope this decreasing temp will not impact too much the development. As I can see the new leaves still continue to grow well from day to day Day 18: I put her in my pool greenhouse all day long as the temperature was still cold and the sky very cloudy. The greenhouse keep the temp at 23 during all day no much light. I think I the soil was too dry and the leaves start going down. Will see tomorrow if the water and nutrients help her Day 19: the droopy leave goes up today but start to curl up a lot and the fan leave color changes. I suspect a magnesium deficiency so o check my ph and it was way to high (7.8). I corrected it but as I fed her yesterday I can’t add more water today. I hope it will be better tomorrow Day 20: still very cold outside (-5c). I kept her I side close to the window but very cloudy and not a full sun. The crispyness leaves seems to stop the expedition and the new one in the center grow back. I hope my problem was the PH and I hope this is now fixed.