Verbena is a genus in the family Verbenaceae. It contains about 250 species of annual and perennial herbaceous or semi-woody flowering plants. The majority of the species are native to the Americas and Asia.
Gardeners looking for a flowering annual with a long blooming time and an ability to attract butterflies should consider the reliable verbena. This versatile plant comes in more than 250 perennial and annual varieties that range from vivid trailing plants with copious blooms and plants in hanging baskets to six-foot-tall cottage garden accent plants. Popular in the ancient world for its healing properties and, today, as an essential oil, verbena has long been associated with divinity and the supernatural. Because there are so many types of plants in the Verbena genus, gardeners may be confused about which are perennial and which are annual. Size can vary greatly between varieties, ranging from six-inch ground covers to six-foot plants.