my plant is 5ft and week 6 of flower but is mostly sativa so i be waiting a bit more yet,question is the top of the plants flowers are way more developed and mature,the lower half which came on a bit later some bud sites only 2 weeks ago are naturally less developed but can tell if i waited longer they would develop nicely,when harvest comes could i just harvest the top of the plant and let the lower half mature more so i can get better buds.?