The stately bur oak, native to the Midwest, is a great choice as a shade tree and for specimen plantings in parks, spacious yards, and other large areas. Its massive trunk has gray to brown furrowed bark and its branches bear lustrous dark green leaves that turn yellow-brown in fall. Large acorns with fringed caps attract birds and small mammals.
This species is native to the Chicago region according to Swink and Wilhelm's Plants of the Chicago Region, with updates made according to current research.
- Deciduous (seasonally loses leaves)
- Chicago area,
- North America
- Residential and parks,
- City parkway,
- Wide median
- Shade tree,
- Large tree (more than 40 feet)
- Full sun (6 hrs direct light daily)
- Zone 3,
- Zone 4,
- Zone 5 (Chicago),
- Zone 6,
- Zone 7,
- Zone 8
- Alkaline soil,
- Dry soil,
- Moist, well-drained soil
- Moderately Tolerant
- Messy fruit/plant parts
- Early fall,
- Mid fall
- Game birds,
- Game mammals,
- Migrant birds,
- Small mammals
Tree & Plant Care
Full sun in well drained soil, but adaptable to many soils. Drought tolerant once established.
Prune oaks in the dormant season to avoid attracting beetles that may carry oak wilt.
Disease, pests, and problems
Can be affected by pests such as the leaf galls and kermes scale.
Anthracnose, bacterial leaf scorch, and powdery mildew. Oak wilt is a serious disease of oaks.
Bur oak blight has been found in isolated areas in Illinois.
Native geographic location and habitat
Commonly found in upland savannas.
Bark color and texture
Mature bark is dark gray to brown with deep furrows.
Leaf or needle arrangement, size, shape, and texture
Alternate leaf arrangement.
Large, 4 to 10 inch long leaves with 5 to 7 rounded lobes. The terminal lobe can be fiddle-shaped.
Leaves are lustrous, dark green above with lighter silvery green beneath.
Fall color is yellow-brown.
Flower arrangement, shape, and size
Male flowers hang down in drooping catkins, female flowers are small spikes in leaf axils. Not ornamentally important.
Fruit, cone, nut, and seed descriptions
Large, 2 inch diameter, fringed acorns. The conspicuous fringe covers most of the nut. Fruit ripens in the fall.