Northern Red Oak

Quercus rubra

Fagaceae · broadleaf deciduous tree · introduced

Last updated

Quercus rubra (Fagaceae) is a large deciduous tree native to eastern North America from Nova Scotia and Pennsylvania west to Minnesota and Iowa. It grows to about 81 feet tall with a 59-foot spread, forming a broad, rounded crown at maturity. The leaves have pointed, bristle-tipped lobes (red oak group) and turn russet to red in autumn. Bark on mature trees develops flat-topped ridges separated by shallow furrows.

Northern red oak grows in sun to part shade on a variety of soils (pH 4.3 to 7.3) with moderate water needs. It is fast growing for an oak and transplants more easily than many species. The largest specimens develop in deep, fine-textured soils in protected ravines. It is one of the most important timber oaks and a widely planted urban and shade tree. Hardy in Zones 3b to 8b.

Plant Profile

Size & Form

Height
81 ft
Spread
59 ft
Growth Rate
Moderate

Site Requirements

Light
Sun to Part Shade
Soil Drainage
Adaptable
Soil pH
4.3–7.3
Water
Moderate
Drought Tolerance
Moderate to high
Hardiness
Zones 3b–8b

Ornamental Interest

Bloom Time
May
Fall Color
Brown, red, russet, yellow
Origin
Nova Scotia to Pennsylvania, west to Minnesota and Iowa

Field Observations

Red Oak bud break
Red Oak: Bud break
April 20, 2026 · Issaquah
Watch for this season

Peak Spore Production and Dispersal

Active Conidial Spread

Active Infection & Secondary Spread

Active Below-ground Growth

+ 3 more — see full disease and pest lists below

Diseases: Regionally Documented (13)

Pests: Regionally Documented (14)

Phenological Calendar

View full calendar (1 stages)
Stage Typical Window
Bud break BBCH 07 Mar 15-Apr 15 Observed
Data Maturity
Structured Multiple sources. Expert review underway.