need help with flushing

I am coming to the end of my grow cycle. I have been using a dwc system. My question is that the tops of my plants have about 2 weeks left before harvest while the bottom halves could definitely use some more time.. can i flush the plants and trim off the tops then give the bottom halves more nutes and some more time under the lights? please any help is appreciated

if your so close to harvest why would you want to cut the tops off?? if you flush it gunna affect the hol plant not just the bits you want to grow! your better off getting some extra lights to lower to the bottom of the plant, or top out the stems with no heads to help filter some light down through the top of plant.if you add extra nutes that will also affect the hol plant.simple really

Flush them,Harvest what is ripe and then give the little buds a dose of ferts. When they are ready flush and harvest.