Should I add nitrogen?

In the photos seems like the plant is not getting enough water looking at the lower leaves, so in my experience, that makes the plant eat nutrients from leaves because cant take more from the soil if its not humid enough, and could look ike Nitrogen deficiency but in fact could be the plant cant take the nitrogen present in the soil beacuse soil is too dry. Hope u the best :)

Other than to tell you I think the yellowing leaves are just natural die-off, I agree with everything m0use has said!

I would be feeding that a chicken manure feeding every 3 weeks regardless of anything. That plant is huge and is going to be a beast! Red of it looks nice and green and I would not worry to much about it. Best Of Luck! ***disclaimer, multiple people are answering all questions as there is a contest called GOTM, when a user is selected as the answer they get a point. Please see the contest page for information regarding the details: growdiaries.com/giveaways/GotM-August-2022 Please note, when you reply to anything on the questions part of Growdiaries website, no one will be notified of this. Not even if you use a "@" tag in their name. Best to reach out to them in DM using your inbox, it can be found in the bottom right hand corner of the site. It's the small paper airplane button, it will be highlighted green if you have new messages***

Dang man, that thing needs defoliated! It could be that those leaves aren't getting enough sunlight, so the plant mobilizes the nutrients out of those leaves and lets it fall.

High MamaBear, Read this article from RQS they explain it perfect why leaves turn yellow, how to prevent in the future and how to solve this problem now Here is the link: https://www.royalqueenseeds.com/blog-yellow-cannabis-leaves-n523 Happy Growing! 😋