Which plant is known as a popular ornamental plant due to its trailing habit and profusion of flowers?

Calibrachoa is recognized as a popular ornamental plant primarily due to its attractive trailing growth habit and abundant flowering capability. This plant, often referred to as "million bells," produces numerous small, bell-shaped flowers that are available in a wide range of colors, making it a favorite for hanging baskets and container arrangements. Its trailing nature makes it ideal for vertical gardening and landscape design, where it can cascade beautifully over edges and create a vibrant display.

The combination of its capacity to produce abundant blooms and its ability to thrive in various conditions, including full sun and partial shade, contributes to its popularity among gardeners and landscapers alike. Its maintenance requirements are relatively low, making it accessible for both novice and experienced gardeners, which further enhances its desirability as an ornamental plant.