Foliage: The leaves are oblong to elliptic, blue-green (glaucous) on the undersides, providing a distinctive look, especially when the wind blows through them.

Flowers: Produces fragrant, white to pale pink tubular flowers with a sticky texture, typically blooming in late spring to early summer. The flowers are known for their sweet, clove-like fragrance and attract pollinators such as bees and butterflies.

Light Requirements: Prefers partial shade to full sun. Swamp Azalea thrives in partial shade, especially in hot climates, where protection from intense afternoon sun helps prevent leaf scorch. However, it can also tolerate full sun, particularly in cooler regions, which can enhance flowering.

Soil Requirements: Prefers moist, well-draining, acidic soil. Rhododendron viscosum var. glaucum grows best in rich, loamy soil with a pH range of 4.5-6.0. It naturally occurs in wetland areas, so it performs well in soils that remain consistently moist but well-draining. Incorporating organic matter, such as compost, peat moss, or leaf mold, will improve soil structure, increase acidity, and retain moisture.

Watering: Requires regular watering to maintain consistently moist soil. This azalea thrives in wet conditions, so ensure that the soil remains evenly moist, particularly during dry periods. It can tolerate occasional standing water, making it suitable for rain gardens or planting near water features. Avoid letting the soil dry out completely.

Temperature and Humidity: Hardy in USDA zones 4-9. Rhododendron viscosum var. glaucum is well-suited to a range of climates, from the cooler northern regions to the warmer southern areas. It can tolerate cold winters and prefers high humidity, which aligns with its natural wetland habitat. In colder zones, a layer of mulch can protect the roots from freezing temperatures.

Fertilization: Apply a balanced, slow-release fertilizer formulated for acid-loving plants in early spring. An additional light feeding in mid-summer can help sustain growth and flowering. Avoid over-fertilizing, as this can lead to excessive foliage growth at the expense of blooms and can harm the plant’s roots.

Pruning: Prune lightly after flowering to maintain the plant’s shape and remove any dead or damaged branches. Rhododendron viscosum var. glaucum generally requires minimal pruning, as it naturally develops a pleasing form. If necessary, prune in late winter or early spring before new growth begins, but avoid heavy pruning, which can reduce the following year’s blooms.

Pests and Problems: Generally pest-resistant but may occasionally be affected by common azalea pests such as lace bugs, spider mites, or aphids. Ensuring good air circulation around the plant and avoiding overhead watering can help prevent fungal diseases such as powdery mildew or root rot. If pests or diseases are detected, treat with appropriate measures such as insecticidal soap or fungicides.