My girl is 3-5 wks from harvest, and the fan leave...

I would advise against transplanting at this late stage, to do so could induce all sorts of strange things to occur. It is normal for older adult leaves to go yellow when the plant is in flower. What happens is that your plant is re-using vital growth elements like carbs, sugars, amino acids etc that are "stored" in those older leaves, to use in the production of her flowers. It is far more efficient to re-use these "stored" elements during flowering than it is to make those elements from new during flowering. This is a perfect example as to why defoliation is such a bad idea. Had you not had those leaves, vital energy would be being used to make new sugars, carbs, amino acids etc and at the same time, trying to grow flowers. If you had defoliated your plant, your flowers would be smaller, due to your plant trying to grow flowers and having to make new carbs, sugars, amino acids etc at the same time, as there is only so much energy that your plant can produce. Without those leaves, all energy would be "divided" between flower growth and vital element production, resulting in your plant not being able to use as much energy as possible for flower growth, resulting in smaller flowers. At this stage I would suggest giving your plant a dose of half strength "grow" nutrients instead of a feeding with "bloom" nutrients. In future, once flowering first begins, you could continue giving your plants half strength feeds with "grow" nutrients while the first flowers are starting to form and only switching to "bloom" nutrients once your plant has grown small "budlets". This will keep your plant greener through to harvest. Hope this helps..... Organoman.