first time grow/balcony/northernlights (1xfem, 2x auto)

I assumed that I had photoperiod plants, but the plants started to show the first signs of flowering from what I, as a complete newbie, could tell. So, I took some pictures to show to a friend for clarification on whether that should be happening. What happened so far? I repotted from the container in which I got them into 5 L pots the weekend before I left for a week (around the first week of May). During that week, the plants were unsupervised. Sadly, that was the only week of decent weather so far. At least they seemed healthy when I came home, and they grew a lot during that week. Aside from that, it was cloudy and/or rainy most of the time. So all in all, not the best starting conditions for autoflowers, but I am happy that they seem healthy. Pictures were taken between 18.3 and 22.3. Yes, I know I have to clean my balcony to reduce the risk of cross-contamination from unwanted organisms.