looking at a few different breeders of Super Silver Haze on Attitudes site, seems its around 8-11 weeks for flower... typical flowering time for a indica/sativa hybrid... possibly closer to 11 weeks since SSH is a somewhat sativa dominate plant... grow it out and check the trichomes to see when its truely ready... breeders flower times are estimates... use them as a general rule of thumb but dont go by them 100%, only real way to know if its ready is to check the trichomes.