Native to North America, the river birch tree (Betula nigra) puts on a beautiful show during all four seasons. "Bright green leaves on semi-arching branches appear in the spring, followed by long, dangling seed pods in early summer," says Kate Walz, a gardening expert with KW Gardens & Flowers. "In the fall, the leaves turn a striking shade of yellow, and after they drop, the unique exfoliating bark on the trunk is revealed—which provides ornamental interest during the winter."

As the name suggests, the river birch naturally grows along riverbanks and wet areas in the United States. However, this tree can tolerate a variety of soil conditions in the landscape. Often grown as a multi-stemmed tree, its spreading limbs provide an overall pyramidal to oval shape.