Yellow leaves red stems

[Johnnyboy22]

Yellow leaves red stems. Approaching day 40 of flowering. Pictures of plant with light on is about a week and a half ago. I have used nothing but fox farm soil and water. Added molasses two weeks into flowering. They have turned like this in about two weeks. I know I need nutes but I'm not sure what to add to fix my problems and if I can fix it in time?

 

[Potted]

It’s normal for some leaves to turn yellow as it gets closer to harvest