if your plants are at least 12", i would go ahead and start flowering. Some people veg longer and some shorter, depending on the size of your grow space. But take into consideration that the plant will still grow even when you turn on the 12/12 cycle.

I recommend when switching from veg to flower cycle to turn the lights off completely for about 48-72 hours. This helps induce flowering. After 2-3 days of darkness, it's time to switch to 12/12 cycle. Within a week or so you will see little pistils growing....more and more everyday till you have nice buds formed. Once in flowering cycle, you generally have about 8 weeks till the plants are ready to harvest! good luck man! :jointsmile: