What U R discussing is called ...
Revegging/Rejuvenating
a plant
and it works quite well if you follow some simple steps...
Pay attention when U harvest...as U cut the budz
try to leave as MANY leaves as possible still attached to the main plant....and U MUST leave some flowers for her to consume during the Change over.
After U finish harvesting rinse the container with 3 times its volume of Clean water
after that give a nice watering w/ some N in the mix
(Fish Emulsion works well for this)
Now
Place her under 24/0 or 18/6 light
and then we wait..
at first U will see some spiraled leaves followed by single bladed leaves ......followed normal growth
At that time U can take cuts from her or "Clean Her" up and flower her again