Rhododendron periclymenoides (Michx.) Shinners
Rhododendron periclymenoides, commonly known as pink azalea, pinxterbloom, is a shrub.
Rhododendron periclymenoides was already described and the name validly published by AndrÃ© Michaux. It was Lloyd Herbert Shinners, however, who reclassified it into todays valid botanical systematics in 1962.
Rhododendron periclymenoides is a species in the genus Rhododendron which contains approximately 713 to 1538 species and belongs to the family of the Ericaceae (Heath Family). The type species of the genus is Rhododendron ferrugineum.
The comparatively slow-growing shrubs reach heights of 1,2 to 3 metres, they have a erect habit and produce multiple stems. The main growing season is in spring and summer. The plants reach a width of 1 to 1.5 metres.
Wood and Bark
Rhododendron periclymenoides is deciduous. The dark-green, simple leaves are alternate. They are ovate, entire and petiolate. The leaves are around 5 to 10 centimetres large. The foliage is dense and turns an attractive red in autumn.
Flowers and Fruits
Rhododendron periclymenoides produces racemes of showy, purple funnel-shaped flowers from March to May. The plants flower on last years shoots. They are hermaphroditic.
The shrubs produce brown septicidal capsules in summer.
Rhododendron periclymenoides is native to the Northeast of the US, Ohio and the Southeast of the US.
The shrubs prefer a shady situation on moderately moist soil. The substrate should be loamy or sandy-loamy and comparatively poor with a pH between 4,3 and 5,5. The plants need a soil depth of at least 20 centimetres for good growth. They tolerate temperatures down to -40Â°C (USDA zone 3) and need a frost-free period of at least 29 weeks.
Classification after Prof. Dr. Sieber
- forests with low species diversity
Tolerance of special soil conditions
- none: soil salinity, calcareous soil
- low: drought
- medium: anaerobic soil
The ornamental value of Rhododendron periclymenoides lies especially in its fragrance. The recommended planting distance is 1,5 to 1,8 metres. Suited for moorland gardens, rockeries, rooftop gardens and for hedges, as well as suited as cemetery plant, container plant, specimen plant and as bee pasture.
Maintenance and Propagation
The plants usually need very little maintenance.
Propagate by sowing. The seeds require vernalization. Also by cuttings.
Rhododendron periclymenoides is slightly toxic.
Please read the health issues note!
Pests and Diseases
- Walter Erhardt, Erich GÃ¶tz, Nils BÃ¶deker, Siegmund Seybold: Der groÃe Zander. Eugen Ulmer KG, Stuttgart 2008, ISBN 978-3-8001-5406-7. (Ger.)
- Christoper Brickell (Editor-in-chief): RHS A-Z Encyclopedia of Garden Plants. Third edition. Dorling Kindersley, London 2003, ISBN 0-7513-3738-2.