Size Gallon , Viola 'Heartthrob' Plant Patent #19,996, A beautiful foliage plant for a container, border front, or a mass planting in a woodland garden understory. Classic violet flowers appear in mid-spring, but the real sensation is the heart-shaped, foliage that follows with burgundy-purple centers and vibrant green edges. An excellent companion for purple-leafed foliage plants. An herbaceous perennial.