Valerian (Valeriana officinalis L.) is a mild sedative and sleep aid
Passion Flower (Passiflora incarnata) has mild sedative and calmative properties. Taken internally, passion flower is usually combined with other sedative herbs for various types of nervous conditions, including insomnia and related disorders
Hops and Lemon Balm are also used for sleep disorders

Herbal Sleeping Pills from Key West Herbals
Somnulin is a 100% natural and affective formula that contains no hormones like melatonin and serotonin or herbs that may have potentially negative side effects like yohimbe and kava.