RQS - Northern Light Auto

Now forming actual buds with lots of pistils appearing. I am absolutely loving this and a big thanks to this community for reminding me to control pH. I have a feeling this will help her make it through the coming weeks under my well meant but possibly not completely competent caretaking. Adding only Canna 13/14 PK this week. Any advice is welcome. Edit: I found that the NPK nutrient I added last week has likely caused a light Nitrogen toxication. Smaller leaves mid-plant turn dark green snd are clawing a bit. New photo added. Not worrying about this, it is not a lot. I apologised to the plant and she seems to have forgiven me. I have started lowering night time temperature by about 4K, going for around 22°C during day and 19° during night time. Also, I will now go to an 18/6 lighting cycle and aim for air RH of around 55% around the plant.