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Increase Energy with Red Roses: Because red has the slowest vibratory rate and longest wavelength, it stimulates adrenal glands and boosts energy.

Enhance Alertness with Sunflowers: Yellow light waves stimulate the brain, making one alert, clearheaded and decisive. And because people generally associate yellow with the sun's rays and daylight, it's said to help people feel more optimistic.

Relax with Bells of Ireland: Green affects the nervous system, allowing people to breathe slowly and deeply, slowing the production of stress hormones and helping the heart relax.

Boost Confidence with Irises: The color indigo stimulates the brain's pineal gland, which is the regulator of sleep patterns. Indigo also helps to free the mind of worries, fears and inhibitions.

Get a Good Night's Sleep with Delphinium: Blue triggers the production of melatonin, a brain chemical that helps with relaxation and sleep. Blue also stimulates the thyroid gland to release thyroxin, a hormone that regulates metabolic rate.

Prevent Allergies with Orange Daisies: Orange strengthens the immune system and the lungs, which can ward off spring allergies. Orange also conveys confidence, satisfaction and a passion for life.

Relieve Stress with Lilacs: Violet has a cooling effect, alleviating "hot" conditions like heat rash and sunburn, and suppressing hunger and balancing metabolism. It also stimulates the pituitary gland, the part of the brain that releases tension-fighting beta-endorphins.