|R. mucronulatum is not technically an azalea, but rather a deciduous rhododendron. Four-inch elliptic to lanceolate leaves have scales on upper and lower surfaces. Flowers are borne singly from the ends of twigs very early in the season. Foliage turns red to reddish orange in fall. Thrives in full sun.
Plant as you would any of the other azaleas: high and in well-drained, acidic soil, rich with organic matter. Though azaleas have a potentially large list of possible pest and disease problems, they are usually trouble free if planted correctly in proper cultural conditions.