What can I do to get my plants flowering?

A question from a fellow grower:

My plants are in the 12/12 cycle now for 15 days with four three hundred watts full spectrum LED lights and flowering solution added however no sexes are showing to any plant, what can I do to get flowering?

just wait it can take time for buds to start showing 3 weeks to a month is not unusual

OK, thanks for the response. Will try to be relaxed.

Are your plants stretching? do the stems seem to be getting stiffer if so you are well on your way it’s always exciting watching a plant go into flower because they can grow inches in a day

You are right they grow very fast.

You should see lil white hairs starting to grow , once you see the pistils you are in pre-flower , and the wait begins ?