Adolescence: First Menstruation for Girls

I found a wonderful site with many different rituals and customs for this life cycle event. An Askenazi custom (minhag) for mothers to slap their daughters in the face on this occasion. The reasons varied from 'slapping sense' into a newly fertile girl so she would know not to disgrace the family to helping to bring a healthy flush to her face because of the bleeding. This is more of a superstition than a tradition and is also said to keep the evil spirits away.
Of all the alternative customs I read about the one I like best is to take that time to plant a new fruit tree in the honor of the young woman. But I also learned it is a good idea to have a feast including fruits like pomegranates to celebrate and wish good blessings along with the responsibility of becoming a woman.