I'll suggest what i'm thinking. Looks like a little light bleaching on top. The way it starts off really yellow, and fades the further down you go. Droopy lower fan leaves too.
If the light is any closer than 18inches from the top, then i'd consider light bleaching a possibility.
If i tried raising the light, and it didn't start to improve a couple days later, then i would consider that it does need more nutrient.
My thoughts are to raise the light a little.
If no improvement after 24-48hrs, then i'd personally try a light balanced feed, with plenty of runoff.
To better help you, are you able to provide us with ph of your soil, or ec of your feed solution?
Also, i realize it's an autoflower. Important for us to know whether the plant is 60 days young, or 60 days into flower.
Sorry to be naggy. Just trying to pick your brain for info.