Hey so what I can see from your diary that you have up. It's only in its 5th week.
Looking, at her she is done, but does need to ripen some, you are right another 2 weeks at least.
As for the flush, I take it, you flush like me, with just water in the soil, no hard flushing with run off right?
You'll find, there's more than enough nutrients in your soil for weeks, but is still good to harvest without leaving that horrible synthetic nutrient taste you get once you flush for a wk or 2, (soft flushing now) but, yeah there'll be enough nutrients in your soil to finish her off. You can always give a light dose of an organic calmag, will not harm at all once its organic, and you keep the ppm in the 250 range, so my water is 110, so I add 140 to that to make up the 150. If your water is in the 200 range its hard and is more than enough, the calmag will help keep the photosynthesis going.
Good luck pal.