Yeah they are. I quit growing outside many years ago but I understand it's the only way some people can. They are awfully small. There is no timing on flower and harvest. There is a harvest window that can be around 2 weeks or so. Follow the trichomes, when you think she's ready you might want to wait.
I've had the trics look cloudy at 8 weeks of flower but two weeks later the buds were double the size.
Good luck