“Specifically, the researchers found that people who surround themselves with plant life and other forms of natural beauty, indoors and out, experience emotional and mental health benefits that have a positive impact on their social, psychological, physical, cognitive, environmental, and spiritual well-being, These benefits include:

1. Stress reduction. Spending time in natural settings helps speed up recovery from mental fatigue, slow down heart rate, reduce high blood pressure, and lower anxiety.

2. Reduced symptoms of depression. Researchers repeatedly report increases in subjects’ mood, fewer incidents of depressive symptoms, as well as increased memory span and decreased symptoms of anxiety after a walk in nature, as compared to a walk through an urban environment. One Korean study of patients diagnosed with moderate to severe depression compared the effects of cognitive-behavioral therapy (CBT) performed in a hospital to CBT performed in an arboretum with a forest-like setting. Symptoms of depression were most significantly reduced in the arboretum group, who also experienced 20% to 30% higher rates of complete remission when compared to a typically medicated group.

3. Stronger memory retention. Compared to those who walked through a well-trafficked urban area, participants in several studies who walked through a green space or a natural environment, such as an arboretum, were better able to focus and concentrate on a test of their working memory.

4. Fewer symptoms of post-traumatic stress. Studies of both veterans and victims of natural disasters who participated in horticultural therapies or nature-based rehabilitation programs found that both groups were better able to control symptoms of PTSD and developed more positive states of mind.

5. Improved symptoms of attention-deficient disorders (ADD/ADHD). In one study, school children diagnosed with ADHD were better able to concentrate after a walk in a park than their peers who went for a walk in a downtown neighborhood. Similar studies found that even short nature breaks are restorative and can improve attention span, working memory and cognitive functioning in children with ADD/ADHD.”

Psychology Today (11 Ways Plants Enhance Your Mental and Emotional Health | Psychology Today)