Your plant on the left. My plant on the right.
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What you see on the right is the color your plants should be looking like after giving them some nitrogen and some phosphorus nutrients during the veg stages, this you are lacking in your plant right now!.
With me on my plants Including into my flowering but I hold back a little more on the nitrogen during the flowing stages but they never turn yellow!.
My dad's Vietnam war strain from the 60's that he left me seeds of in his will after 9/11 they are called the mojoe flower power dreamer plant from the 60's below, you can see the difference in what I am saying to you here. You also have to know exactly how much phosphorus to giving them without your buds tasting like it to so its an art by itself but you'll learn and getting the hang of it over time!.
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CK