ya kuri, that does makes sense, although that pic is a branch of a 6 footer with many branches, but like i said it may be a bit older than 3 weeks. if you boost up the food it may speed up....bigger plant needs more to eat! what are you feeding it btw?

don't worry, from week 3 onward you should really start to see some buds forming. usually around week 3 or 4 is when things really start to pick up.