The sight of crocus forcing itself through the hard soil serves as the first proof that the world is ready to bloom once more. Following suit are the white daisy-like blossoms of bloodroot, which thrive in shaded and woodland gardens, and the classic bright petals of daffodils, which enjoy full sun. The days are longer, yes, but the mere presence of garden flowers help to rejuvenate the human spirit and lift moods.

Until recently, however, no studies have existed that prove the relationship between flowers and positive mood. As researchers note in An Environmental Approach to Positive Emotions: Flowers, “For more than 5,000 years, people have cultivated flowers although there is no known reward for this costly behavior.” Today, our body of knowledge in this area is beginning to grow, as we understand that emotional well-being directly impacts physical health and longevity.

In their study, the above researchers found that senior citizens provided with flowers over a two-week period reported both short-term and long-term effects on mood. Flower recipients reported a higher interest and engagement in the world around them, increased happiness, reduced rates of depression and higher scores on an episodic memory test.

All recipients responded with a genuine, heartfelt smile when presented with flowers – a smile scientifically called a Duchenne smile. True smiles change brain chemistry, prompting the release of endorphins and serotonin.

As Mother Nature herself begins to smile this month, she provides us with an abundance of natural, blossoming tools to elicit Duchenne smiles from others. Consider presenting older adults with a flower from early spring’s blooms in your therapeutic garden, and watch the reaction – and their mood – light up the room.