Catawba Rhododendron

Catawba rhododendron is the species behind the classic, large-leaved, evergreen rhododendron that anchors shade gardens and foundation plantings across the Pacific Northwest. The flowers appear in late spring in large, rounded clusters, trusses, in lavender-purple, pink, red, or white depending on the cultivar. The leathery, dark green leaves are evergreen, providing year-round structure that few other flowering shrubs match. Native to the Appalachian Mountains from Virginia to Georgia and Alabama, where it forms dense thickets on mountain slopes.

In Western Washington, Catawba rhododendron and its thousands of hybrid offspring thrive in the acidic, moist, well-drained soil and part-shade conditions that define most residential sites. This is rhododendron country, the climate and soil are nearly ideal. The cultural requirements are specific: acidic pH, consistent moisture, excellent drainage, and protection from afternoon sun in summer. The shallow root system performs best at or just above grade. Mulch with coarse organic material but keep it away from the trunk. Several diseases and pests are tracked, including root rot in waterlogged soil and lace bug in sunny, dry sites. For the foundational evergreen flowering shrub of the Western Washington shade garden, rhododendron is the standard against which everything else is measured.