depends how you feed. some people like myself prefer to keep them green till the end. As I grow in 4" pots (that's seed plants, clone, mothers, everything) my plants need water once or twice per day, so i only need to let mine dry out for just a few days.
Indoor growing and you are nature... you may decide to pluck off the buds and leave the plant in tact, leaves and all... then re-veg it and flower it all over again. You may decide to simulate fall and cut the nutrient supply early, get some pretty colours on the leaves. It's all up to you.