Heliotrope, or cherry pie plant, has very fragrant summer flowers and clean, textural green foliage. Heliotrope is a fine annual plant for butterfly gardens, window boxes, pots, the fragrant garden and more.Large clusters of small purple, white or lavender flowers cover heliotrope throughout the summer. These fragrant flowers smell like cherry and vanilla, which has earned heliotrope the common name of cherry pie plant.Bushy tender perennial or annual one to two feet tall and wide. Heliotrope tends to turn toward the sun throughout the day, giving it the common name of turnsole. Its botanical name, Heliotrope, means “move with the sun.” It turns back to the east overnight to prepare for sunrise.