Hi nice plants. In northern California you still have until late Sept, 25th or so before the daylight hours equal 12. If your plants are less sensitive to light they might flower in the mean time even though until then there is still appx 13 hours of light everyday. Either way it would be best to keep as much artificial light from them during night time as possible, because that can interfere with the plants giving them more than the 12 or 13 hours of light they get from the sun.