[Organic soil (promix veg and herb), indoor, 1200 watt LED, no nutes, 6.5 pH water. 24 light for 3 weeks, then 18/6, and a period of time when I did 24 hour for 3 days and switched back to 18/6]
It happened naturally (in other words - I didn't do anything and don't know wtf happened) at week 6...