Purple signs on leafs

Thank you for all answers guys. I will see what will happen in next weeks.

Anthocyanins my guy.

This does not look like a deficiency. Looks a lot more like Autumn colours beginning to show later in flower. 18c is not that cold so not sure it's temps. Most likely genetic makeup, overall she looks really happy and healthy! I'm jealous hehe

low temps cause this in addition to genetics. unless you've been underfeeding, nute levels are not related in any common sense context of a happy plant. adding more nutes won't change the fact that various chemical reactions are impacted by the lower temps - either don't happen or maybe just more slowly. you may recognize this outside if you have seasonal changes. "autumn colors" occur once outside temps start dropping, and not because of some nute imbalance in the earth.

And yes 18 c or 64 F night temps will bring out color early.

This was from not enough nutrition, and or you have substrate ph issues going on.

It’s called.. Afghan….. purple. I’d say it’s genetics by the look of it

It sounds like you might be dealing with a potential nutrient deficiency, possibly related to the adjustment in lamp height. The signs on the Afghan Purple could indicate issues like magnesium or phosphorus deficiency. Consider adjusting your nutrient mix, and keep an eye on pH levels. Also, monitor the new lamp height to ensure optimal light distribution. Night temperatures dropping to 18°C might be on the cooler side but generally shouldn't cause major issues for Afghan Purple. Make gradual changes and observe plant response.