A welcome sight in the garden come spring, dianthus are admired for their spicy clove-scented flowers and cottage-style appeal. This low-maintenance plant blooms in nearly every color, from white to almost black. Plants come in a range of shapes and sizes, from low, mat-forming groundcovers to upright varieties 3 feet tall. Their uses in the garden are nearly endless, from border displays and rockeries, to containers and cutting gardens. Dianthus plants attract butterflies and hummingbirds, as well as pollinating insects.