Mangel, Überdüngung, komischer Phänotyp?

Hey, your plant is approaching natural death, so those discolorations are completely normal. This means your plant is using up its last reserves and doesn't need as much nutrients and water as it did a few weeks ago. You can also dim the light a bit to simulate autumn and preserve the terpenes. The lower yellow leaves that are falling off are probably a slight nitrogen deficiency; I would say next time you can generally feed your plants a bit more. But it's too late for this lady now. Don't worry, just be patient, let her mature, and now only water ;)