Look,, the veg phase of growth is when you top and train, and pinch all the sites to double them.You top as soon as you have2-3 nodes.I pinch the tops out before I put them in their first real pot.All this plant manipulation needs to be done as soon as possible.Pinching sites etc.,slows the growth down because you have just redirected the plants growth .Very quickly the plant will produce more usefull growth.More bud sites, less useless height and denser wider plants. To top at 12/12 is a waste.Plants dont have the time needed to establish its self before switching to flowering.-usdi Agaluga