Swamp White Oak

Quercus bicolor

Fagaceae · broadleaf deciduous tree · introduced

Last updated

Quercus bicolor (Fagaceae) is a deciduous tree native to eastern North America from Quebec to Minnesota and south to Georgia and Arkansas. It grows to about 75 feet tall with a broad, rounded crown and distinctive bicolored leaves: dark green above with pale, silvery-white felt beneath. The bark becomes deeply furrowed and shaggy with age.

Swamp white oak grows in full sun on moist to wet, acidic soils (pH 4.5 to 8.5) and tolerates seasonal flooding, clay, and poorly drained sites. It is one of the most adaptable oaks for wet conditions. Drought tolerance is moderate once established. Fall color is yellow to bronze. The acorns are among the sweetest of the white oaks and are important wildlife food. Hardy in Zones 4a to 8b.

Plant Profile

Size & Form

Height
75 ft
Spread
50-60 ft
Growth Rate
Fast
Size at 20 yr
30 ft
Lifespan
Long-lived

Site Requirements

Light
Sun to Part Shade
Soil Drainage
Wet Tolerant
Soil pH
4.3-6.5
Water
High
Drought Tolerance
Low
Hardiness
Zones 4a–8b

Ornamental Interest

Bloom Time
April
Fall Color
Brown, yellow, red
Origin
from Quebec, Pennsylvania
Watch for this season

Primary Spore Release

Spring Canker Activation

Spore Release (Fall & Spring Rains)

Active Below-ground Growth

+ 4 more — see full disease and pest lists below

Diseases: Regionally Documented (13)

Pests: Regionally Documented (14)

Phenological Calendar

View full calendar (8 stages)
Stage Typical Window
Bud break BBCH 07 Feb 15-Mar 15
Leaf emergence BBCH 11 Mar 1-Apr 1
Bloom start BBCH 61 Mar 1-Mar 31
Bloom end / petal fall BBCH 69 Apr 1-Apr 15
Fruit/seed development BBCH 71 Jun 1-Aug 31
Fruit/seed maturity BBCH 85 Sep 1-Nov 30
Fall color / leaf senescence BBCH 93 Oct 1-Nov 15
Dormancy BBCH 97 Nov 15-Feb 28
Data Maturity
Structured Multiple sources. Expert review underway.