Probably wouldn't hurt to top dress it with compost, kelp meal, bokashi.
Buildabloom is also good.
It appears to be starting to take some nutrients from lower leaves for flowering.
I am on my phone so can't see anything in those pics if there is any Hermaphrodite signs showing
Likely due to the need for Ca and N. You cant really add these and expect things to improve with this plant.
Looks like you got enough soil there for the long haul. Top dress as suggested but don't expect any miracles. My indoor plants always do that and I never do anything cept happy at harvest time.
What he means is your chick is in flower so she is stealing nutrients from lower fan leaves causing them to yellow out. Fan leaves store nutrients up for this purpose but if you have a well built soil or if she is properly fed then it’s possible to stay green all the way thru to harvest.
doesn’t appear to be a hermie but you would need to check all over to identify that
Depending on how ‘tight’ I’m being with the nutes, I generally start using up the lower-leaf batteries during flowing and start getting yellowing in the lower leaves. I like this as I see it as efficient use of what’s already loaded into the plant and it tells me that I’m am not continuing to load them up with more than they need. It’s all a bit of a balancing act - I did’t see any herms in there, but go through and look carefully. Nothing messes up 3.5 months of waiting like an unwanted ‘banana’. Look good otherwise tho TB!