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Oak, BurQuercus macrocarpa

Oak, Bur—Quercus macrocarpa

Tolerant of a variety of moisture and soil conditions, adapts well to urban settings. Its fringed acorns are food for wildlife. A very long-lived tree. Prefers full sun. Grows 70' to 80', 80' spread. (zones 3-8)

Zones 3 - 8
Zones 3 - 8

Hardiness Zones: Zones 3 - 8
The Bur Oak can be expected to grow in the zones shown in color in the arborday.org zone map. (see map below)

Shade Tree
Shade Tree

Type of tree:
The Bur Oak falls into the following type(s): Shade Trees

70' - 80' High
70' - 80' High

Mature Height:
The Bur Oak grows to be 70' - 80' feet in height.

80' Spread
80' Spread

Mature Spread:
The Bur Oak has a spread of about 80' at full maturity.

Slow Growth
Slow Growth

Growth Rate:
This tree grows at a slow growth rate. [More about this.]

Full Sun
Full Sun

Sun:
This oak does well in full sun.

Various Soils
Various Soils

Soil:
The Bur Oak grows in acidic, alkaline, drought tolerant, loamy, sandy, well drained, wet, wide range, clay soils.

Rounded Shape
Rounded Shape

Shape:
This oak has rounded, spreading or horizontal shape.

More Info
More Info


The Bur Oak can be expected to grow in the zones shown on this map.

Attributes:
In addition to its notable strength, Bur Oak has other attributes that make it a splendid tree for urban landscapes. It provides food for squirrels, dense shade, and is resistant to air pollution and heat stress. Its generally slow growth is compensated by longevity that may exceed 200 to 300 years.

Description:
Tolerant of a variety of moisture and soil conditions, adapts well to urban settings. Its fringed acorns are food for wildlife. A very long-lived tree. Prefers full sun. Grows 70' to 80', 80' spread. (zones 3-8)

Wildlife Value:
Bur oak acorns are at the top of the food preference list for wood ducks, wild turkeys, whitetail deer, rabbits, mice, squirrels and other rodents.

History/Lore/Use:
Bur Oaks are the dominant trees that grace Arbor Day Farm and the hills and valleys surrounding Nebraska City. There, on the banks of the lower Missouri River, this magnificent Oak is close to the heart of its natural range. It is the most western of the eastern Oaks, extending all the way to the foothills of the Rockies where it is reduced to a shrub. In pioneer days on the plains, it came to the rescue of unfortunate travelers who needed new wagon tongues, wheel hubs or spokes. Sioux City, Iowa is the location of the Council Oak, so named because Lewis and Clark held council with the Native Americans under its already 150 year old branches.

Moisture:
Moderate moisture with some drought tolerance.

Leaves:
This tree alternates, large, 6 to 12 inch wide leaves. Each leaf has 5 to 9 lobes separated about half way by a pair of particularly deep sinuses.

Flower Color:
Drab brown color, not significant.

Bloom Time:
April-May.

Fruit Description:
The acorns of the Bur Oak are larger than most other Oaks and have a cap that extends about half way down and is conspicuously fringed. This feature gives the tree its other name, the Mossycup Oak.