Calibrachoa are also trailing petunia because of their  bell-shaped flowers and their resemblance to petunias. This plant is native to South America and typically grows to a height of 6-12 inches and a width of 12-24 inches due to its trailing habit, which makes it suitable for hanging baskets. Flowers come in a wide variety of colors and often have more than one color to them. Plant information from UMN Extension and photo from Gardenia.net