I have one plant inpiticular that sports bright yellow new growth that also turns green at the tips and moves tward the base until the whole leaf is green. But by that time a new set of leaves has started and are bright yellow. Some of my other plants had yellow on the new growth but when I gave them nitrogen in their nutes they greened up but not as dark as the rest of the older leaves. I think because everything has been the same, light schedule, feeding, cutting for clones, ect. So I'm leaning toward the fact the geneitcs from this plant have come from somewhere in the family tree because they all look the same except this one.
If your flowering don't give large amounts of nitrogen!!! Good luck.....