Mimosa Evo

Nice, another new Cannabian! Beautiful grow. I don't think you've watered too little. If you had, the leaves would all be drooping. Your plant will stop stretching, then it won't need the leaves for growth anymore and will use their nutrients. So to speak, cannibalistic. So yellow leaves in the later flowering phase are normal. You'll see more yellow leaves every day now.

While going through the weeks, I noticed the following: Day temperature? Really 22°. That's a bit low. The day temperature is not the current outside temperature, but the temperature in the tent during the day phase. You have the humidity at 60% during growth and 55% in flowering. I take 70% during growth and 65% in flowering. But it depends on the day temperature. Maybe check out a VPD chart. pH value is okay, but 6.0 would be better. That's my first analysis.