Ayurveda is the oldest science in the world and has many remedies for mood upliftment. Herbs such as Herpestis Monniera, Emblica Officinalis, Acorus Calamus, Withania somnifera, Nardostachys Jatamansi, Valeriana wallichii, Hypericum Perforatum, have shown potential benefits when treating mild-moderate depression.
To know how to use herbal combinations in order to achieve desired effects, it is best to consult an Ayurvedic doctor.
Herpestis monniera
http://en.wikipedia.org/wiki/Bacopa_monnieri
http://www.sciencedirect.com/science/article/pii/S0944711398800019
http://www.sciencedirect.com/science/article/pii/S0924977X1100071X
Withania somnifera
http://www.sciencedirect.com/science/article/pii/S0944711300800306 .
nardostachys jatamansi
http://nopr.niscair.res.in/bitstream/123456789/4455/1/IJEB%2046%284%29%20212-218.pdf.