I Veg for the bare minimum of 3 weeks from sprout, they usally have 3-4 nodes and are 5-6 inches tall by the time I flip to 12/12 at the start of week 4, and they usually stand around 3ft tall by the end of flowering. I average around 2 1/2oz's a plant, growing Power Kush, which is a pretty vigorous and fast growing plant.