Whats up...

krisk1227 is absolutely right. You can give a plant 12/12 any time of the year using light deprivation. The best way is just building a cheap wooden frame around your plant and every day just going out and covering the frame over with black trash bags or panda film. Just covering the plant itself if the easiest way but its healthier if you make a frame.

Just make sure your frame is tall enough because they are going to get much bigger!