Red leaves on auto

My auto plant has gotten a lot of red leaves, check the pics below. Anyone knows why it's like that? It emerged from soil 70 days ago (march 24th) it's a jack herer auto.



I haven't used nutes for a week and few days. This started to happen like 3 days ago

with 1-2 weeks to run...?

I'd say that is anthocyanin

check your temps, often a cold rootball would allow these sugars to build up in the leaf

stuck there waiting for warm temps

this late tho ...could be permanent

good luck