3-5 weeks are the vegative stage
4-6 weeks is the stretch phase
6-10 weeks is typically the flower stage is a good chart on a autos life. some autos do not like to be topped and will produce not much, some autos love it and take off. but you never know, anyways with seeds that do not sprout 72hrs. if they sprout after they most likely are not that healthy, the healthy seeds pop in less than 24hrs. a moist paper towel is the best way to germinate, like I said healthy seeds pop fast. hope this helps