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Plant library  ·  Shade Trees

Red Oak

Quercus rubra

Red Oak is a long-lived shade tree for large, open landscapes. Reaching about 70 feet tall with a broad, rounded canopy about 45 feet wide, it becomes a major organizing feature rather than a background planting. Its native character and red fall color give it strong year-round presence, while its eventual scale calls for a site that can remain open as the tree matures.

Sunlight Full Sun
Water Moderate
USDA zones 3–8
Planning spacing 45 ft
Typical mature size 70 ft tall, 45 ft wide

Red Oak spacing and mature footprint

Space Red Oak 45 ft apart, measured center to center (13.7 m).

The mature spread is about 45 ft (13.7 m), so neighboring plants just meet at maturity without crowding.

Treat 45 ft as a planning baseline — cultivar and local growing conditions shift the final footprint.

Compare with the full shade tree spacing chart

Three plants set 45 ft apart, center to center; shaded circles show the 45 ft mature spread.

Placement and use

Use Red Oak as a lawn or specimen tree where its canopy can spread without crowding a house, drive, overhead utilities, or smaller trees. Set it well back from paths, patios, and beds that need consistent sun, since the mature crown will cast substantial shade. The branching canopy can begin relatively low, so reserve clear circulation space around the trunk and avoid treating the area beneath it as a narrow passage or a permanent full-sun bed.[1]

Spacing and mature footprint

Plant Red Oaks 45 feet apart, center to center, when arranging more than one. That distance matches the expected mature width, allowing neighboring canopies to meet or nearly meet rather than being forced into each other. For a single tree, draw a 45-foot-wide canopy circle on the plan, then add practical clearance for mowing, trunk access, and the changing shade edge around nearby planting areas.

Sun, water, and soil

Choose a full-sun position and provide moderate water while the tree establishes. A well-drained site suits its long-term footprint; deep, fertile soil with an acidic to neutral reaction supports dependable growth. Avoid placing it where water stands after rain or where a shallow, compacted planting strip leaves little room for roots to develop.[1][2]

Seasonal notes

The broad canopy provides the strongest spatial effect during the growing season, then opens after leaf drop to admit more winter light. Foliage turns red to red-brown in autumn, making this tree especially visible from major windows, drives, and long views. Acorns mature in early fall, so allow for seasonal cleanup where hard paving, seating, or frequently used paths sit beneath the canopy.[1][2]

Planning caveats

Treat this as a permanent large-tree commitment rather than a quick screen. Red Oak performs best where soil drainage is reliable and soil conditions do not encourage nutrient-related leaf yellowing. Oak wilt is also a serious consideration in areas where it occurs, so leave enough room around the tree for inspection and future professional access without disrupting beds or structures.[2]

Growing facts

Botanical name
Quercus rubra
Type
Shade Tree
Category
Shade Trees
Lifecycle
perennial
USDA hardiness zones
3–8
Sunlight
Full Sun
Water
Moderate
Planning spacing
45 ft
Typical mature size
70 ft tall, 45 ft wide
Plan a garden with red oak

References

  1. Red Oak — Quercus rubra — North Carolina Extension Gardener Plant Toolbox
  2. Quercus rubra — Plant Finder — Missouri Botanical Garden