I'm coming to the end of my grow, well two of the four plants are about to be harvested. I've been looking in to doing a staggered harvest but if I flush my plants before I harvest won't all the leaves start to yellow because it begins to take the nutrients out of the leaves themselves? So if the leaves are dying how can I cut the top colas off but leave the lower buds if the plant has already yellowed? I hope I explained my question well and any input would be appreciated.