Ive read that you can harvest half the plant and then move the lights down and let the rest develop.I often have that problem, the top of my plant gets done before the bottom. I usually just take the whole plant at the sametime, but dont like how some of the lower buds are very tiny, and still have lots of white hairs, while the top of the plant the hairs are all dying and sucking back in, and bud looks very tight and done. Wondering myself what I should do, if anything