Hey Growmie,
You can make a solid estimate of when to harvest by tracking the hairs change in color from white to orange. Observing your buds’ trichomes offers the most accurate indication of when to harvest. So once 50-70% of the hairs are orange and the trichomes are milky/cloudy, she's ready. Hopefully, I answered your question and remember ..."Happy Growing" and "Free your mind one puff at a time"