Swamp White Oak

Swamp white oak is the eastern oak that thrives in wet soil, the deciduous tree with the deeply lobed, two-toned leaves (dark green above, silvery-white beneath) and the peeling, shaggy bark on the upper trunk and branches that adds year-round texture. It grows fifty to sixty feet with a rounded, broad crown. The acorns are produced on long stalks, which is unusual for an oak. Native from Quebec to Minnesota and south to Georgia and Arkansas, it grows naturally in floodplains, swamp margins, and bottomland forests.

In Western Washington, swamp white oak is one of the best large shade trees for wet, poorly drained sites. It handles seasonal flooding, clay soils, and the low spots where most oaks struggle with root rot. The fall color is yellow to bronze, not as vivid as scarlet or red oak but acceptable. No significant disease or pest concerns are tracked in this region. For parks, large residential lots, and street plantings with heavy or periodically wet soil, swamp white oak provides the longevity and structural presence of an oak without the well-drained site requirement that limits most species in the genus.