Bach's Flower Remedies
Personal formula to aid in depression
Elm
Gentian
Gorse
Mustard
Sweet Chestnut
White Chestnut
Wild Rose
Gentian
Gorse
Mustard
Sweet Chestnut
White Chestnut
Wild Rose
Also helpful:
Cherry Plum
Larch
Oak
Olive
Rock Water
Bare minimum:
Genetian
Mustard
White Chestnut
Wild Rose