Dwarf purple rhododendron is a study in maximum impact from minimal stature. Native to alpine regions of China, this compact, slow-growing evergreen barely reaches a foot in height but spreads 1 to 2 feet wide over time, its fragrant, leathery gray-green leaves forming a tight mound that carries year-round interest even before the flowers arrive. In spring, purple blooms cover the plant so completely that the foliage practically disappears beneath them. Deer tend to leave it alone, an unusual quality in the genus.

Partial shade with protection from harsh afternoon sun is important, as is moist, acidic, well-drained soil. Clay soils need organic amendment and slightly raised planting to protect the shallow roots from rot. Set plants about 15 inches apart and they will gradually grow together into a dense, weed-suppressing groundcover. In smaller spaces a single plant works beautifully at the front of a border, in a rock garden, or in a container. Its scale and slow rate of growth have also made it a popular subject for bonsai practice.