Pinxterbloom Azalea

Pinxterbloom Azalea at Jenkins Arboretum in Philadelphia, PA

Pinxterbloom (Rhododendron periclymenoides), formerly R. nudiflorum, is a hardy deciduous azalea native to a large geographic area of the eastern United States. Pinxterbloom naturally grows nearby streams in a light woodland setting, but appears to tolerate dry rocky sites equally well after 2 years established. Shrub heights vary from 4-8 feet. Pinxterbloom spreads by underground stolons and shrubs may become quite dense.

Flowers open in mid to late spring and are often mistaken for honeysuckle blooms. Flower clusters (called “trusses”) appear just before the leaves emerge and bear 6 – 12 blooms each, which open 1½  – 2 inches wide.  Flower colors vary among species populations from white to dark pink, most pale to pastel pink. The open petals curve back to show off the long extended stamens and styles. Flower fragrance also varies among plant populations.

Pinxterbloom azalea prefers an acidic, organically rich, moist, well-drained soil. Root rot and plant death often occur on poorly drained sites; planting on raised beds may be a good option on a heavy clay site. Partly shaded or dappled sun exposure is best.

Disease and insect problems are infrequent when pinxterbloom azalea is sited correctly. Soil moisture and acidity are key factors for successfully growing U.S. native azaleas.

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