ummm, generally speaking, Mj is an annual plant, so it dies after budding and producing flowers, seeds, etc.
Umm. Not true. If you leave some leaves and shoots on the plant you can put it back on 18/6, grow veg for a while then go back to 12/12 for another harvest. This can be done maybe 2-3 times.
It can go back to veg. Then clone, bloom, harvest, kill off older plants, veg, clone the clones, bloom, harvest, ex..