National Gardening Day is designed to help people learn more about gardening as a hobby and how much of a satisfying pastime it can be. You'll be able to enjoy it for years, not just one! National Gardening Day encourages everyone to go outside and revitalize some neglected gardening space. Gardening offers many health benefits, such as physical activity and a way to escape from the worries of daily life today. All you need is some space outdoors -- even if it's just a few square feet!