Tip for ya G... seen as they are auto's you want to be in your final pot soon. Don't leave them for to long or you may stunt them when transplanting, which may cause them to not stretch that much... I will always transplant between 3 - 7 days (about a week) of popping ground if I was starting in a smaller pot. Most of the time I will start an auto in its final pot. Like what Need4weed has said she is putting down that tap root and as soon as she reaches the bottom of the cup she will put her energy above ground. Transplant as that tap hits the bottom of the cup a she can carry on the energy finding the base of the next pot. Take about 2 - 3 days for her reach the bottom a large-ish pot of say 3 gallons. You will amazed how fast that tap root shoots down.