Flowering plant leaves yellowing/dying

So this plant is a cut I got from a friend of a friend who got it from a breeder friend of his. I've grown it out before and dont remember this happening but it was much smaller.

It was switched to 12/12 on 5/3/16. It gets watered twice a week(or so), with full nutes. General organics 3/4/4 and Cal Mag in distilled water. I allow a lot of run off. Water with a half gallon and get a quarter gallon back. I don't take many pictures but a week ago it looked great.

thats 60 days in flower, how long did it take to finish before? looks like its feeding off the leafy goodness, going into the autumn of its life.

Imo she is finishing up beautifully... How long did you flower it before? Could be a difference in environment between runs that yellowed it. Either way beautiful plant I'd be checking trichs

I didn't record dates before my current grow so I'm not sure how long I flowered it before. (I know, I've changed my ways). The environment is a bit different, same tent/ lights/ soil/ and nutes though. I'm now growing in my garage instead of a big walk in closet. Honestly though the garage has been so much easier to control environment in.

I agree thought she's about done. Buds at still swelling a bit and more amber trichs everyday. I'm running this strain in a rotation. Have another cut off it at about 5 weeks into 12/12. I'll watch how it ends ito cycle and if it does the same but with good results I'll assume it is just the natural cycle of its life. Thanks for the replies.