According to feng shui traditions, these plant and flower colors encourage the following emotions. You will notice, however, that these are almost identical to the traditional color correspondences of the Witch and the magickal practitioner.
Black: enigma, enchantment
Blue: peace, healing, relaxation
Cobalt Blue: connecting to a higher purpose
Green: growth, prosperity, tranquility
Light Green: relief, tranquility
Lime Green: awakens the spirit
Magenta: higher emotional and spiritual processes
Orange: energy, fusion, conversation, mysticism
Pale Blue: mystery, contemplation
Pink: friendship, affection, romance
Purple: spirituality, magick, divinity
Red: power, exhilaration, passion, warm feelings
Silver and Grey: goddess colors, moon magick
White: purity, innocence, new beginnings
Yellow: clarity, mental illumination, intuition
Excerpted from Garden Witch's Herbal, by Ellen Dugan