Anyone know what this is?

Whats up everyone!?! Well I'm at the end of my 5th week of flower and my leaves are starting to look funky. Can't anyone tell me what the issue is?

This is how they look as they mature.The yellow tips are nitrogen excess,keep an eye on it Looks good, just be patient.

May be a slight Mg deficiency starting. A lot of time when you bump up K during flower you‘ll get that. High K levels antagonize Mg and Ca. Good time for a shot of Epsom salt. I try to maintain a K:Mg ratio of 4:1.