Rhododendron oblongifolium, commonly known as Swamp Azalea, is a deciduous shrub found in moist, acidic soils of pine barrens, bogs, swamp edges, and wet woodlands in the Southeastern United States. It is native to areas from Arkansas to Texas. This species typically grows to a height and width of 2.5 m (8.2 ft), featuring rounded matte green leaves. During early summer, Swamp Azalea is adorned with funnel-shaped white flowers that are flushed pink, exuding a strong fragrance. The flowers are particularly showy due to their prominent stamens and are a highlight in any garden when in bloom.

Swamp Azalea is valued for its fragrant, showy flowers and its ability to thrive in wet, shady conditions, making it suitable for woodland gardens and naturalized areas. It is also used as an accent plant in mixed borders. Gardeners should provide an environment with dappled shade and acidic, well-drained soil enriched with leaf mold to mimic its natural habitat. While it is hardy down to −20 °C (−4 °F), it does require protection from harsh conditions. Regular watering is important, especially in drier conditions. Swamp Azalea may be susceptible to common rhododendron pests and diseases such as lace bugs and root rot if drainage is poor.CC BY-SA 4.0