sex show latest after 8 weeks from seed, but flowering start hmm I know two factors - what kind of strain its it. And when start growing outdoors how much hours then was. If was 18 hours of light then should to start when has 14 hours with light if arlyer when was less under hours of light then start flowering later. I think midle of august is arlyer in north and start of august is arlyer in south when can start flowering cannabis. some wheed can produced buds started from julay beggins to produced flowers but just then if you put it in darkness 24-48 hours. but not all strains better start from august flowering.