N
NoSocSlic
At what point in the life cycle of my plants should I throw them into flower for a week to sex them?
The thing about it is that once you switch the lights, you are committed to flowering them out. You can't switch to flower then back to veg without a recovery time.
That being said, you want to switch the light schedule when the plants are about half the size you want them to be. They are going to stretch for the first couple weeks of flower. You can veg for a long time if you want huge plants and tons of bud, or initiate flower early if you want a small amount. It all depends on your needs.