There is a trick to revegging that speeds the reveg up. You have to have vegging roots in order to have vegging growth. So the last 10 days to two weeks of flower, you start running her under 18-6 again. You want to signal to the roots that there is change and you do that with light change. As soon as you start to see any sort of funky growth, harvest your girl but make sure to leave 5-7 small nuggets down low with some fan leaves around it. If you are feeding bottled nutes, start introducing veg nutes back into your girl as soon as you harvest. She will reveg much faster this way supposedly.
I can tell you that doing those things for me (minus the feeding part as I am in LOS) made her start throwing new growth very quickly. She's still a mess, but moving much faster than if I wouldn't have done the light switch early on a week or so before harvesting.
Just remember, it all boils down to roots.......even in revegging. You need new root growth to reveg a plant. Get the root growing before you see the shoots growing and you will be golden!