Rhododendron arborescens, commonly known as Smooth Azalea or Sweet Azalea, is a deciduous shrub native to the moist, acidic soils of the Appalachian Mountains, often found in riparian areas, bog margins, and moist hardwood forests. It typically grows to a height of 8–10 feet with a similar spread. Smooth Azalea is celebrated for its fragrant, showy flowers that bloom in late spring to early summer, ranging in color from white to pink with prominent red stamens, attracting pollinators. The glossy green leaves turn a striking deep red to purple in the fall, adding seasonal interest.

This species is valued for its sweetly scented blooms and vibrant fall foliage. It is used in woodland gardens, mixed borders, and as a specimen plant. Smooth Azalea thrives in acidic soil with a pH between 5.5 and 6, requiring good drainage to prevent root rot. It prefers part shade but can tolerate full sun if not overexposed. Mulching with organic materials like pine bark or wood chips helps retain soil moisture and suppress weeds. Mature plants typically do not require fertilization. The Royal Horticultural Society has recognized it with the Award of Garden Merit for its horticultural merits.CC BY-SA 4.0