Fan Leaves Turning Yellow,

I've never grown outdoors before, or with dirt. But I put a couple plants outside late this year to enjoy some sun.
I have noticed that a lot of fan leaves on my plants are starting to yellow and die. The one that is farthest along in flower is showing the most yellowing, I've attached some pictures.
Just wanted some feedback on what I should do.

N deficiency

Agree with moash. Did you switch to flowering nutes? If so, you might need some N/veg nutes to get you all the way through flowering.

OK That makes sense, the flowering nutrients have a major cut in the N department, I am going to mix in some nutrients with a high N ratio to supplement and hopefully it will improve.

I had read about it being normal for some fan leaves to yellow and drop during flowering but I wanted to be sure.