Researchers believe that just seeing greenery calms us down (it's an
This mini tree maximizes that effect by reaching heights up to 50 inches.
In one study from Washington State University, people in a room of plants
including this evergreen had a 4-point drop in their systolic blood pressure
after taking a stressful test, compared with only a 2-point drop in a group that
had no exposure to plants.
Dry air can lead to a parched nose and throat--and raise the risk of infection or run-of-the-mill sinusitis, says Michael Janson, MD, author of User's Guide to Heart-Healthy Supplements. But houseplants can inject moisture back into the air and boost humidity by up to 5%, finds research from Bavarian State Institute of Viticulture and Horticulture in Germany. A humidifier would do more, but the natural boost from plants is enough to help alleviate symptoms. According to a study from the Agricultural University of Norway, people with table and floor-standing plants in their offices reported 37% less coughing
Small openings on the underside of a plant's leaves release moisture into the
air, boosting humidity to alleviate cold symptoms. Because of English ivy's high volume of leaves, horticulturists recommend it as one of the most effective cold-fighting plants.
In one study from the Agricultural University of Norway, people with office
plants including the heart-leaf philodendron reported 37% less coughing and 25% less hoarseness after 3 months than when they left their offices plant-free.