Over the past week I have gradually reduced the amount of light to create a relatively natural transition. I could already see on week 4 day 6 that the plants were starting to stretch. The plants now sleep from 8:00 a.m. to 8:00 p.m. The cool temperatures at night ensure that the tent doesn't get too warm. Over the course of the week there will be another water change in which the nutrients for the flower will be adjusted.
@James, The dynamite diesel sounds very good, I've always been a big fan of the original. Can your seeds actually be used well for mothers? or would you recommend regular seeds?
For certain reasons I had to move my grow room into a tent. The second Purple Queen now serves as a mother plant for later grows. I still have to work with the humidity and temperature a bit, but I think everything will settle down quickly.