Yeah, the yellowing of some of the upper leaves. I'm not worried about the lower leaves. But you can see on the overhead shot that a few of the leaves are yellowing a bit and looking a bit curled. I know that Nitrogen deficiency is pretty common late in flowering and that the buds pull nutes from the leaves. I guess it seems to my unexperienced sensibility that I'm a little bit farther out from harvest for it to be normal.