Purple and lollipop-shaped, 'Marble Ball' is a double-flowering Ball Dahlia that delights with petals that curiously curve and spiral inward. Magnificent, variegated petals of white and purple make 'Marble Ball' the perfect choice for the long-season garden, as its multi-colored blooms can create the illusion of ?freshness? by disguising the discoloration that can come with aging and fading. (Dahlia)