Gardens can make your lawn look great. But research shows that kind of yard work can make you feel great, too.

According to research from the Centers for Disease Control and Prevention, light gardening or yard work can help burn about 330 calories each hour for a person who weighs on average, 154 pounds.

The American Horticultural Therapy Association cites research that gardening can be therapeutic. It can help those suffering from mental illnesses like Post Traumatic Stress Disorder. Gardening is also known to help improve memory, critical thinking, socialization and language skills, according to the organization's website.

AHTA says horticultural therapy can help those in need of physical rehabilitation. Gardening can help strengthen muscles and improve coordination, balance and endurance. The website also says participants can learn to work independently and problem solve.

For more information on different types of gardening and horticultural programs, click here.

Gardening and yard work can also be a learning experience. Virginia Tech's Hahn Horticulture Garden has been a different kind of classroom for students. Those enrolled in certain classes learn everything from native to exotic plants, trees to shrubs, and other plants. For more information on the Hahn garden, click here.