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Chamomile has a herbaceous, sweet and slightly tart fragrance that helps to relieve insomnia caused by nervous tension. Roman chamomile (Anthemis nobilis) tends to have a sweeter fragrance than German chamomile (Matricaria recutita).
Clary sage has potent sedative effects on the nervous system and has a slightly euphoric effect that is helpful for relieving insomnia. It also has muscle-relaxing properties. Clary sage has a warm, sweet, musty scent.
Lavender has soothing, sedating, and balancing effects on the mind and body. It has a floral, herbaceous fragrance with sweet or balsamic undertones.
Marjoram eases muscular and nervous tension and has relaxing and sedative effects. It has a sweet, spicy herbaceous fragrance.