How young are we talking here?

The plant will show you when it is ready to flower by going from leaves opposite to leaves alternating. This means there will be a petiole sticking off one side of the stem, and a little ways up, a petiole will stick off the other side. The main stem may take on a slightly zigzag growing habit at the top.

There is no point trying to force a plant to flower before this happens. I have never tried it, but I will guess that either you will get poor bud development because the root system is not strong enough to feed a flowering plant that needs a lot of energy, of you will end up with stress hermaphrodites, or both.

Just be patient. You will thank yourself for it later when you cut down a big fat bud.

Someone correct me if I'm wrong please.